1

open

play
adjective \ˈō-pən, -pəm\

Definition of open

opener

play \ˈōp-nər, ˈō-pə-\;

openest

play \ˈōp-nəst, ˈō-pə-\
  1. 1 :  having no enclosing or confining barrier :  accessible on all or nearly all sides cattle grazing on an open range

  2. 2a (1) :  being in a position or adjustment to permit passage :  not shut or locked an open door (2) :  having a barrier (as a door) so adjusted as to allow passage the house was openb :  having the lips parted stood there with his mouth wide openc :  not buttoned or zipped an open shirt

  3. 3a :  completely free from concealment :  exposed to general view or knowledge their hostilities eventually erupted with open warb :  exposed or vulnerable to attack or question :  subject open to doubtc :  being an operation or surgical procedure in which an incision is made such that the tissues are fully exposed

  4. 4a :  not covered with a top, roof, or lid an open car her eyes were openb :  having no protective covering open wiring an open wound

  5. 5 :  not restricted to a particular group or category of participants open to the public open housing: such asa :  enterable by both amateur (see amateur 1) and professional (see 1professional 2a) contestants an open tournamentb :  enterable by a registered voter regardless of political affiliation an open primary

  6. 6 :  fit to be traveled over :  presenting no obstacle to passage or view the open road open country

  7. 7 :  having the parts or surfaces laid out in an expanded position :  spread out :  unfolded an open book

  8. 8a (1) :  low 13 an open vowel (2) :  formed with the tongue in a lower position Italian has an open and a close eb (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

  9. 9a :  available to follow or make use of the only course open to usb :  not taken up with duties or engagements keep an hour open on Fridayc :  not finally decided :  subject to further consideration the salary is open an open questiond :  available for a qualified applicant :  vacant the job is still opene :  remaining available for use or filling until canceled an open order for more itemsf :  available for future purchase these items are in open stockg :  available for breeding :  not now pregnant an open heiferh :  not proprietary :  available to third party developers an open computer platform

  10. 10a :  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 marriageb :  accessible to the influx of new factors (as foreign goods) an open market

  11. 11a :  having openings, interruptions, or spaces open mesh: such as (1) :  being porous (see porous 2a) and friable open soil (2) :  sparsely distributed :  scattered open population (3) of a compound :  having components (see 1component 1) separated by a space in writing or printing (as opaque projector)b :  not made up of a continuous closed circuit (see 1circuit 2a) of channels the insect circulatory system is open

  12. 12a of an organ pipe :  not stopped at the topb of a string on a musical instrument :  not stopped by the finger

  13. 13 :  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

  14. 14a (1) :  characterized by lack of effective regulation of various commercial enterprises (see enterprise 3) an open town (2) :  not repressed (see repress 1) by legal controls open gamblingb :  free from checking or hampering restraints an open economyc :  relatively unguarded by opponents passed to an open teammate

  15. 15 :  having been opened by a first ante, bet, or bid the bidding is open

  16. 16 of punctuation :  characterized by sparing use especially of the comma when possible without causing misinterpretation

  17. 17a :  containing none of its endpoints an open intervalb :  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

  18. 18a :  being an incomplete electrical circuitb :  not allowing the flow of electricity an open switch

  19. 19 of a universe :  having insufficient mass (see 2mass 1c) to halt expansion gravitationally

open

adverb

openly

play \ˈō-pən-lē\ adverb

openness

play \ˈō-pə(n)-nəs\ noun

Examples of open in a sentence

  1. The door suddenly swung open.

  2. You left the blinds wide open.

  3. The meat was roasted over an open fire.

  4. I was so tired that I couldn't keep my eyes open.

  5. Don't chew with your mouth open.

  6. staring with her eyes wide open

  7. There's already an open jar of pickles in the refrigerator.

  8. They kept the road open throughout the winter.

Origin and Etymology of open

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


First Known Use: before 12th century

Synonym Discussion of open

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.

2

open

verb

Definition of open

opened

play \ˈō-pənd, ˈō-pəmd\;

opening

play \ˈōp-niŋ, ˈō-pə-\
  1. transitive verb
  2. 1a :  to move (as a door) from a closed positionb :  to make available for entry or passage by turning back (as a barrier) or removing (as a cover or an obstruction)

  3. 2a :  to make available for or active in a regular function open a new storeb :  to make accessible for a particular purpose opened new land for settlementc :  to initiate access to (a computer file) prior to use

  4. 3a :  to disclose or expose to view :  revealb :  to make more discerning or responsive :  enlighten must open our minds to the problemsc :  to bring into view or come in sight of by changing position

  5. 4a :  to make an opening in opened the boilb :  to loosen and make less compact open the soil

  6. 5 :  to spread out :  unfold opened the book

  7. 6a :  to enter upon :  begin opened the meetingb :  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

  8. 7 :  to restore or recall (as an order) from a finally determined state to a state in which the parties are free to prosecute or oppose

  9. intransitive verb
  10. 1 :  to become open the office opened early

  11. 2a :  to spread out :  expand the wound opened under the strainb :  to become disclosed a beautiful vista opened before us

  12. 3 :  to become enlightened or responsive

  13. 4 :  to give access the rooms open onto a hall

  14. 5 :  speak out 2 finally he opened freely on the subject

  15. 6a :  to begin a course or activityb :  to make a bet, bid, or lead in commencing a round or hand of a card game

  16. 7 :  to provide the opening performance of a show before the main event

openability

play \ˌōp-nə-ˈbi-lə-tē, ˌō-pə-\ noun

openable

play \ˈōp-nə-bəl, ˈō-pə-\ adjective

Examples of open in a sentence

  1. This door is hard to open.

  2. Open the door! shouted the police officer.

  3. Would you mind if I opened a window?

  4. The car door opened and a beautiful woman stepped out.

  5. The door opened and closed so quietly that I didn't notice he had come in the room.

  6. This drawer is stuck. It just won't open!

  7. She comes home, turns on the TV, and starts opening her mail.

  8. She opened her eyes and smiled at me.

  9. I opened my umbrella and stepped out into the rain.

  10. Open your mouth wide for me, said the dentist.

Origin and Etymology of open

see 1open


First Known Use: before 12th century


3

open

noun

Definition of open

  1. 1 :  opening

  2. 2 :  open and unobstructed space: such asa :  open airb :  open water

  3. 3 :  an open contest, competition, or tournament

  4. 4 :  a public or unconcealed state or position

Examples of open in a sentence

  1. a daguerreotype of a cowboy whose face is roughened from a hard life in the open

Origin and Etymology of open

see 1open


First Known Use: 13th century


OPEN Defined for English Language Learners


2

open

verb

Definition of open for English Language Learners

  • : 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


3

open

noun

Definition of open for English Language Learners

  • : a competition (such as a major golf tournament or tennis tournament) that allows both professionals and amateurs to participate

  • the open : 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 Defined for Kids

1

open

play
adjective \ˈō-pən\

Definition of open for Students

  1. 1 :  not shut or blocked :  not closed an open window open books

  2. 2 :  not sealed, locked, or fastened an open zipper There's an open bottle of ketchup in the refrigerator.

  3. 3 :  easy to enter, get through, or see open country

  4. 4 :  ready to consider appeals or ideas an open mind

  5. 5 :  not drawn together :  spread out an open flower open umbrellas

  6. 6 :  not enclosed or covered an open boat an open fire

  7. 7 :  not secret :  public They have an open dislike for one another.

  8. 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. 9 :  not decided or settled an open question

openly

adverb

openness

noun

2

open

play
verb

Definition of open for Students

opened

;

opening

  1. 1 :  to change or move from a shut condition Sit down and open a book. The door opened. She opened her eyes.

  2. 2 :  to clear by or as if by removing something in the way Workers were sent to open a road blocked with snow.

  3. 3 :  to make or become ready for use They plan to open a store. The office opens at eight.

  4. 4 :  to give access The rooms open onto a hall.

  5. 5 :  begin 1, start Police have opened an investigation. They opened fire on the enemy.

opener

\ˈō-pə-nər, ˈōp-nər\ noun

3

open

play
noun

Definition of open for Students

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


Medical Dictionary

1

open

play
adjective \ˈō-pən\

Medical Definition of open

  1. 1a:  not covered, enclosed, or scabbed over an open lesion an open running ulcerb:  not involving or encouraging a covering (as by bandages or overgrowth of tissue) or enclosure open treatment of burnsc:  relating to or being a compound fractured:  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. 2:  shedding the infective agent to the exterior open tuberculosis—compare closed 3

  3. 3a:  unobstructed by congestion or occlusion open sinusesb:  not constipated open bowels

  4. 4:  using a minimum of physical restrictions and custodial restraints on the freedom of movement of the patients or inmates an open psychiatric ward


2

open

verb

Medical Definition of open

opened

;

opening

  1. 1

  2. transitive verb

  3. a:  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

  4. 2:  to make one or more openings in opened the boil

  5. intransitive verb

  6. :  to spread out the wound opened


Law Dictionary

1

open

adjective

Legal Definition of open

  1. 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 Editor's 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. 2 :  not restricted to a particular group or category of participants; specifically :  enterable by a registered voter regardless of political affiliation an open primary

  3. 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. 4 :  not repressed or regulated by legal controls a state with open gambling


2

open

verb

Legal Definition of open

opened

opening

  1. transitive verb
  2. 1 :  to begin the process of open the succession

  3. 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)

  4. 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

  5. intransitive verb
  6. 1 :  to begin action :  commence on some course or activity the stock opened at par

  7. 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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