open

adjective
\ ˈō-pən How to pronounce open (audio) , -pᵊm\
opener\ ˈōp-​nər How to pronounce opener (audio) , ˈō-​pə-​ \; openest\ ˈōp-​nəst How to pronounce openest (audio) , ˈō-​pə-​ \

Definition of open

 (Entry 1 of 3)

1 : having no enclosing or confining barrier : accessible on all or nearly all sides cattle grazing on an open range
2a(1) : being in a position or adjustment to permit passage : not shut or locked an open door
(2) : having a barrier (such as a door) so adjusted as to allow passage the house was open
b : having the lips parted stood there with his mouth wide open
c : not buttoned or zipped an open shirt
3a : completely free from concealment : exposed to general view or knowledge their hostilities eventually erupted with open war
b : exposed or vulnerable to attack or question : subject open to doubt
c : being an operation or surgical procedure in which an incision is made such that the tissues are fully exposed
4a : not covered with a top, roof, or lid an open car her eyes were open
b : having no protective covering open wiring
5a : having the skin cracked, cut, or broken so that underlying tissue is exposed abrasions, lacerations, and other open wounds — see also open fracture
b of a head injury : marked by fracture or penetration of the skull
6 : not restricted to a particular group or category of participants open to the public open housing : such as
a : enterable by both amateur (see amateur sense 1) and professional (see professional entry 1 sense 2a) contestants an open tournament
b : enterable by a registered voter regardless of political affiliation an open primary
7 : fit to be traveled over : presenting no obstacle to passage or view the open road open country
8 : having the parts or surfaces laid out in an expanded position : spread out : unfolded an open book
9a(1) : low sense 13 an open vowel
(2) : formed with the tongue in a lower position Italian has an open and a close e
b(1) : having clarity and resonance unimpaired by undue tension or constriction of the throat an open vocal tone
(2) of a tone : produced by an open string or on a wind instrument by the lip without the use of slides, valves, or keys
10a : available to follow or make use of the only course open to us
b : not taken up with duties or engagements keep an hour open on Friday
c : not finally decided : subject to further consideration the salary is open an open question
d : available for a qualified applicant : vacant the job is still open
e : remaining available for use or filling until canceled an open order for more items
f : available for future purchase these items are in open stock
g : available for breeding : not now pregnant an open heifer
h computers : not proprietary : available to third party developers But while IBM pushes Notes, a proprietary technology created in the 1980s, a raft of new and much smaller rivals is plying the "open" technology of the 1990s: software on the World Wide Web, the fastest growing part of the Internet.— Bart Ziegler — compare open-source
11a : characterized by ready accessibility and usually generous attitude: such as
(1) : generous in giving
(2) : willing to hear and consider or to accept and deal with : responsive open to an offer open to suggestion
(3) : free from reserve or pretense : frank was open about his personal life
(4) of a relationship : not restricted to one partner at a time by mutual agreement — see also open marriage
b : accessible to the influx of new factors (such as foreign goods) an open market
12a : having openings, interruptions, or spaces open mesh : such as
(1) : being porous (see porous sense 2a) and friable open soil
(2) : sparsely distributed : scattered open population
(3) of a compound : having components (see component entry 1 sense 1) separated by a space in writing or printing (such as opaque projector)
b : not made up of a continuous closed circuit (see circuit entry 1 sense 2a) of channels the insect circulatory system is open
13a of an organ pipe : not stopped at the top
b of a string on a musical instrument : not stopped by the finger
14 : being in operation an open microphone especially : ready for business, patronage, or use the store is open from 9 to 5 the new highway will be open next week
15a(1) : characterized by lack of effective regulation of various commercial enterprises (see enterprise sense 2) an open town
(2) : not repressed (see repress sense 1) by legal controls open gambling
b : free from checking or hampering restraints an open economy
c : relatively unguarded by opponents passed to an open teammate
16 : having been opened by a first ante, bet, or bid the bidding is open
17 of punctuation : characterized by sparing use especially of the comma when possible without causing misinterpretation
18a : containing none of its endpoints an open interval
b : being a set or composed of sets each point of which has a neighborhood all of whose points are contained in the set the interior of a sphere is an open set
19a : being an incomplete electrical circuit
b : not allowing the flow of electricity an open switch
20 of a universe : having insufficient mass (see mass entry 2 sense 1c) to halt expansion gravitationally

open

verb
opened\ ˈō-​pənd How to pronounce opened (audio) , ˈō-​pᵊmd \; opening\ ˈōp-​niŋ How to pronounce opening (audio) , ˈō-​pə-​ \

Definition of open (Entry 2 of 3)

transitive verb

1a : to move (something, such as a door) from a closed position
b : to make available for entry or passage by turning back (something, such as a barrier) or removing (something, such as a cover or an obstruction)
2a : to make available for or active in a regular function open a new store
b : to make accessible for a particular purpose opened new land for settlement
c : to initiate access to (a computer file) prior to use
3a : to disclose or expose to view : reveal
b : to make more discerning or responsive : enlighten must open our minds to the problems
c : to bring into view or come in sight of by changing position
4a : to make an opening in opened the boil
b : to loosen and make less compact open the soil
5 : to spread out : unfold opened the book
6a : to enter upon : begin opened the meeting
b : to commence action in a card game by making (a first bid), putting a first bet in (the pot), or playing (a card or suit) as first lead
7 : to restore or recall (something, such as an order) from a finally determined state to a state in which the parties are free to prosecute or oppose

intransitive verb

1 : to become open the office opened early
2a : to spread out : expand the wound opened under the strain
b : to become disclosed a beautiful vista opened before us
3 : to become enlightened or responsive
4 : to give access the rooms open onto a hall
5 : speak out sense 2 finally he opened freely on the subject
6a : to begin a course or activity
b : to make a bet, bid, or lead in commencing a round or hand of a card game
7 : to provide the opening performance of a show before the main event

open

noun

Definition of open (Entry 3 of 3)

1 : opening
2 : open and unobstructed space: such as
a : open air
b : open water
3 : an open contest, competition, or tournament
4 : a public or unconcealed state or position

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Other Words from open

Adjective

open adverb
openly \ ˈō-​pən-​lē How to pronounce openly (audio) \ adverb
openness \ ˈō-​pə(n)-​nəs How to pronounce openness (audio) \ noun

Verb

openability \ ˌōp-​nə-​ˈbi-​lə-​tē How to pronounce openability (audio) , ˌō-​pə-​ \ noun
openable \ ˈōp-​nə-​bəl How to pronounce openable (audio) , ˈō-​pə-​ \ adjective

Synonyms & Antonyms for open

Synonyms: Adjective

clear, cleared, free, unclogged, unclosed, unobstructed, unstopped

Synonyms: Verb

unclose

Synonyms: Noun

nature, open air, out-of-doors, outdoors, wild, wilderness

Antonyms: Adjective

blocked, clogged, closed, jammed, obstructed, plugged, shut, stopped, stuffed, uncleared

Antonyms: Verb

close, shut

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Choose the Right Synonym for open

Adjective

frank, candid, open, plain mean showing willingness to tell what one feels or thinks. frank stresses lack of shyness or secretiveness or of evasiveness from considerations of tact or expedience. frank discussions candid suggests expression marked by sincerity and honesty especially in offering unwelcome criticism or opinion. a candid appraisal open implies frankness but suggests more indiscretion than frank and less earnestness than candid. open in saying what they think plain suggests outspokenness and freedom from affectation or subtlety in expression. plain talk

liable, open, exposed, subject, prone, susceptible, sensitive mean being by nature or through circumstances likely to experience something adverse. liable implies a possibility or probability of incurring something because of position, nature, or particular situation. liable to get lost open stresses a lack of barriers preventing incurrence. a claim open to question exposed suggests lack of protection or powers of resistance against something actually present or threatening. exposed to infection subject implies an openness for any reason to something that must be suffered or undergone. all reports are subject to review prone stresses natural tendency or propensity to incur something. prone to delay susceptible implies conditions existing in one's nature or individual constitution that make incurrence probable. very susceptible to flattery sensitive implies a readiness to respond to or be influenced by forces or stimuli. unduly sensitive to criticism

Examples of open in a Sentence

Adjective

The door suddenly swung open. You left the blinds wide open. The meat was roasted over an open fire. I was so tired that I couldn't keep my eyes open. Don't chew with your mouth open. staring with her eyes wide open There's already an open jar of pickles in the refrigerator. They kept the road open throughout the winter.

Verb

This door is hard to open. Open the door!” shouted the police officer. Would you mind if I opened a window? The car door opened and a beautiful woman stepped out. The door opened and closed so quietly that I didn't notice he had come in the room. This drawer is stuck. It just won't open! She comes home, turns on the TV, and starts opening her mail. She opened her eyes and smiled at me. I opened my umbrella and stepped out into the rain. Open your mouth wide for me,” said the dentist.

Noun

a daguerreotype of a cowboy whose face is roughened from a hard life in the open
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Recent Examples on the Web: Adjective

The land’s sole open ride, Millennium Falcon: Smugglers Run, in fact requires six people to work together. Todd Martens, latimes.com, "Star Wars: Galaxy's Edge becomes a live-in video game with the Disney Parks app," 8 July 2019 Clark most recently helped open Tartine Manufactory. Janelle Bitker, SFChronicle.com, "Say goodbye to Boot & Shoe Service and hello to Sister," 8 July 2019 And an assistant city attorney said the city would begin talks aimed at amending the contract to comply with the city charter’s open-books requirement. Jon Murray, The Denver Post, "Denver auditor asks city to take action against airport Westin hotel for withholding records," 8 July 2019 Also open are the 49ers’ two days of joint practices at the Denver Broncos facility in Englewood, Colo., on Aug. 16 and 17, ahead of their Aug. 19 exhibition. Cam Inman, The Mercury News, "49ers reveal dates public can attend training camp," 8 July 2019 Georgia Atlanta: Area libraries are offering open-air book borrowing, free computer usage and story hours al fresco. USA TODAY, "Roller coaster ghost town, Alaska heat, rock hyrax pups: News from around our 50 states," 8 July 2019 The week of July 4 is the quietest one in the NFL calendar, when coaches, players and team employees scatter for down time before training camps open and the next season is afoot. Jenny Vrentas, SI.com, "It’s the Heart of the NFL Offseason, and Anthony Lynn Is Making the Most of It," 8 July 2019 Women and communities of color would see previously unwinnable seats open to them, especially across the South. Steve Mulroy, The New Republic, "To Beat the Gerrymander, Think Outside the Lines," 8 July 2019 With Amerson gone, one open spot still remains on the Cardinals’ 90-man roster. Bob Mcmanaman, azcentral, "Arizona Cardinals position breakdown: A closer look at the defensive backs," 7 July 2019

Recent Examples on the Web: Verb

Screen Door and Good Coffee will open locations in Concourse B as part of forthcoming renovations scheduled to finish in spring 2021. oregonlive.com, "Screen Door, Tillamook to open new outposts at Portland’s airport," 9 July 2019 The southern state of Kerala opened its first charging station late last month. Ananya Bhattacharya, Quartz India, "Softbank is helping Ola’s electric vehicle business lead a revolution in India," 3 July 2019 Earlier this year, Buc-ee's opened its first outpost in another state in Robertsdale, Alabama. Perri Ormont Blumberg, Southern Living, "Here's What's Next for Buc-ee's," 2 July 2019 Answering one simply opens the door to asking another. Karn Manhas, Quartz at Work, "What if you posed your company’s mission statement as a question?," 2 July 2019 The event will open to fans at noon CT near the Benjamin Franklin statue on LaSalle Drive. Alicia Delgallo, Pro Soccer USA, "England coach Phil Neville irked by U.S. staff scouting hotel for World Cup final," 1 July 2019 To much fanfare on the WWDC stage, Apple claimed developers simply need to open their iPad app project in Xcode and click a single check box to be able to build a Mac app. Samuel Axon, Ars Technica, "Catalyst deep dive: The future of Mac software according to Apple and devs," 1 July 2019 Misaki Seats at the sushi bar of Misaki, newly opened in Los Cabos, look out from just high enough of an angle that the blond wood of the window frames only the ombré of blues, from endless sea meeting clear blue sky. Naomi Tomky, Fortune, "One of Mexico City’s Hottest Restaurant Groups Fuses Mexican and Japanese Influences," 29 June 2019 Their immediate concerns were to prevent further impact to the area and to open the Bindy Bazaar to visitors with a reconstructed trail network and with interpretive signage. Martin Finucane, BostonGlobe.com, "Archeologists are examining a famous New York ritual gathering site: Woodstock," 25 June 2019

Recent Examples on the Web: Noun

Jackson, now 17, took an online test open to the public back in March 2018, scoring well enough on the 50 question quiz to qualify for an in-person audition in Missouri. Matthew Glowicki, The Courier-Journal, "Catch this JCPS student on 'Jeopardy!' Thursday as he competes for big money," 20 June 2019 The vision of the internet as an open and shared platform in which technologies and standards cross borders and develop in a globalized fashion is one that has always been more of a guiding light than an actual reality. James Griffiths, CNN, "A world divided by 5G: Russia's Huawei deal is the latest sign of an emerging internet iron curtain," 7 June 2019 Analysts say if the Renault deal is well and truly dead, then talks could re-open between FCA and France’s PSA Group, makers of Peugeot, Citroën, DS, Opel and Vauxhall. Bernhard Warner, Fortune, "The Renault Deal Is Dead, But Fiat Chrysler Still Desperately Needs a Partner," 7 June 2019 Brussels and London are still seeking a solution that would keep the border open between EU member Ireland and the U.K.'s Northern Ireland, just six months before Britain leaves the bloc. Fox News, "The Latest: EU studying Brexit border compromise," 18 Sep. 2018 More than two years after its account-sales scandal broke out into the open, Wells Fargo & Co. is still a long way from cleaning up the mess. Aaron Back, WSJ, "Wheels Come Off Wells Fargo Stagecoach Yet Again," 28 Mar. 2019 Check the store navigator to find a local store open near you this April 21. Taysha Murtaugh And Nicol Natale, Woman's Day, "15 Restaurants Open for Easter Brunch Near Me," 11 Feb. 2019 The cold open was just the beginning of SNL's all-in approach to the Kavanaugh hearings. Zoe Weiner, Glamour, "Matt Damon Played a Belligerent Brett Kavanaugh on SNL's 44th Season Premiere," 30 Sep. 2018 The whole space has an open, flowing layout, to encourage seamless wandering. Elise Taylor, Vogue, "A First Look at the Faena Bazaar, Miami Beach’s New Design Destination," 3 Dec. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'open.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of open

Adjective

before the 12th century, in the meaning defined at sense 1

Verb

before the 12th century, in the meaning defined at transitive sense 1a

Noun

13th century, in the meaning defined at sense 1

History and Etymology for open

Adjective, Verb, and Noun

Middle English, from Old English; akin to Old High German offan open, Old English ūp up

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Statistics for open

Last Updated

11 Jul 2019

Look-up Popularity

Time Traveler for open

The first known use of open was before the 12th century

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More Definitions for open

open

noun

Financial Definition of open

What It Is

In the stock markets, open refers to the beginning of the trading day or the price of a security at the beginning of the trading day.

How It Works

The New York Stock Exchange has the most famous opening bell. At 9:30 am Eastern time, it rings. At that time, the last trading price for each security on the exchange the day before (the closing price) becomes the opening price, or the open.

Why It Matters

The open is the start of a new day, though it is important to note that that doesn't necessarily mean trading hasn't been going on right before the open. After-hours markets remain open as do other exchanges in other countries and time zones, which provides opportunity for the price to change right up until the open in many cases.

Source: Investing Answers

open

adjective

English Language Learners Definition of open

 (Entry 1 of 3)

: not covering an opening
: having an opening that is not covered
: not sealed or locked

open

verb

English Language Learners Definition of open (Entry 2 of 3)

: to move (a door, window, etc.) so that an opening is no longer covered
: to move and no longer cover an opening
: to cause (something) to no longer be covered, sealed, or blocked

open

noun

English Language Learners Definition of open (Entry 3 of 3)

: a competition (such as a major golf tournament or tennis tournament) that allows both professionals and amateurs to participate
: an area or place without walls, barriers, etc. : an area or place that is not covered or enclosed
: a situation in which something (such as a feeling) is no longer hidden or kept secret

open

adjective
\ ˈō-pən How to pronounce open (audio) \

Kids Definition of open

 (Entry 1 of 3)

1 : not shut or blocked : not closed an open window open books
2 : not sealed, locked, or fastened an open zipper There's an open bottle of ketchup in the refrigerator.
3 : easy to enter, get through, or see open country
4 : ready to consider appeals or ideas an open mind
5 : not drawn together : spread out an open flower open umbrellas
6 : not enclosed or covered an open boat an open fire
7 : not secret : public They have an open dislike for one another.
8 : to be used, entered, or taken part in by all an open meeting It was an open race—any number of dogs could be entered.— John Reynolds Gardiner, Stone Fox
9 : not decided or settled an open question

Other Words from open

openly adverb
openness noun

open

verb
opened; opening

Kids Definition of open (Entry 2 of 3)

1 : to change or move from a shut condition Sit down and open a book. The door opened. She opened her eyes.
2 : to clear by or as if by removing something in the way Workers were sent to open a road blocked with snow.
3 : to make or become ready for use They plan to open a store. The office opens at eight.
4 : to give access The rooms open onto a hall.
5 : begin sense 1, start Police have opened an investigation. They opened fire on the enemy.

Other Words from open

opener \ ˈō-​pə-​nər , ˈōp-​nər \ noun

open

noun

Kids Definition of open (Entry 3 of 3)

: space that is not enclosed or covered : outdoors Some slept in a cabin while others slept in the open.

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open

adjective
\ ˈō-pən How to pronounce open (audio) \

Medical Definition of open

 (Entry 1 of 2)

1a(1) : having the skin cracked, cut, or broken so that underlying tissue is exposed abrasions, lacerations, and other open wounds — see also open fracture
(2) of a head injury : marked by fracture or penetration of the skull
b : not involving or encouraging a covering (as by bandages or overgrowth of tissue) or enclosure open treatment of burns
c : being an operation or surgical procedure in which an incision is made such that the tissues and organs are fully exposed — compare open-heart
2 : shedding the infectious agent to the exterior open tuberculosis — compare closed sense 3
3a : unobstructed by congestion or occlusion open sinuses
b : not constipated open bowels
4 : using a minimum of physical restrictions and custodial restraints on the freedom of movement of the patients or inmates an open psychiatric ward

open

verb
opened; opening

Medical Definition of open (Entry 2 of 2)

transitive verb

1a : to make available for entry or passage by removing (as a cover) or clearing away (as an obstruction)
b : to free (a body passage) of congestion or occlusion an inhalator for opening congested nasal passages open clogged arteries
2 : to make one or more openings in opened the boil

intransitive verb

: to spread out the wound opened

open

adjective

Legal Definition of open

 (Entry 1 of 2)

1 : exposed to general view or knowledge : free from concealment an open, notorious, continuous, and adverse use of the property an open and obvious danger

Note: When a defect, hazard, or condition is open such that a reasonable person under the circumstances should have recognized the danger posed by it, a defendant is usually relieved of liability for failure to warn.

2 : not restricted to a particular group or category of participants specifically : enterable by a registered voter regardless of political affiliation an open primary
3a : being in effect or operation an open mine a bench warrant still open
b : available for use an open toll road
c : not finally determined, decided, or settled : subject to further consideration an open question
d : remaining effective or available for use until canceled an open insurance contract
4 : not repressed or regulated by legal controls a state with open gambling

open

verb
opened; opening

Legal Definition of open (Entry 2 of 2)

transitive verb

1 : to begin the process of open the succession
2a : to make the statement by which the trial of (a case) is begun and put before the court
b : to be the first to speak in summing up or arguing (a case)
3 : to restore or recall (as an order, rule, or judgment) from a finally determined state to a state in which the parties are free to prosecute or oppose by further proceedings

intransitive verb

1 : to begin action : commence on some course or activity the stock opened at par
2 : to begin the trial of a case defendant…has the option of presenting an opening statement immediately after plaintiff opens— J. H. Friedenthal et al.

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More from Merriam-Webster on open

Thesaurus: All synonyms and antonyms for open

Spanish Central: Translation of open

Nglish: Translation of open for Spanish Speakers

Britannica English: Translation of open for Arabic Speakers

Comments on open

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