Dictionary

1open

adjective \ˈō-pən, -pəm\
open·er \ˈōp-nər, ˈō-pə-\ open·est \ˈōp-nəst, ˈō-pə-\

Definition of OPEN

1
:  having no enclosing or confining barrier :  accessible on all or nearly all sides <cattle grazing on an open range>
2
a (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 open>
b :  having the lips parted <stood there with his mouth wide open>
c :  not buttoned or zipped <an open shirt>
3
a :  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
4
a :  not covered with a top, roof, or lid <an open car> <her eyes were open>
b :  having no protective covering <open wiring> <an open wound>
5
:  not restricted to a particular group or category of participants <open to the public> <open housing>: as
a :  enterable by both amateur and professional contestants <an open tournament>
b :  enterable by a registered voter regardless of political affiliation <an open primary>
6
:  fit to be traveled over :  presenting no obstacle to passage or view <the open road> <open country>
7
:  having the parts or surfaces laid out in an expanded position :  spread out :  unfolded <an open book>
8
a (1) :  low 13 (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
9
a :  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 :  not proprietary :  available to third party developers <open source code>
10
a :  characterized by ready accessibility and usually generous attitude: as (1) :  generous in giving (2) :  willing to hear and consider or to accept and deal with :  responsive (3) :  free from reserve or pretense :  frank
b :  accessible to the influx of new factors (as foreign goods) <an open market>
11
a :  having openings, interruptions, or spaces <open mesh>: as (1) :  being porous and friable <open soil> (2) :  sparsely distributed :  scattered <open population> (3) of a compound :  having components separated by a space in writing or printing (as opaque projector)
b :  not made up of a continuous closed circuit of channels <the insect circulatory system is open>
12
a of an organ pipe :  not stopped at the top
b of a string on a musical instrument :  not stopped by the finger
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
a (1) :  characterized by lack of effective regulation of various commercial enterprises <an open town> (2) :  not repressed 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>
15
:  having been opened by a first ante, bet, or bid <the bidding is open>
16
of punctuation :  characterized by sparing use especially of the comma
17
a :  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>
18
a :  being an incomplete electrical circuit
b :  not allowing the flow of electricity <an open switch>
19
of a universe :  having insufficient mass to halt expansion gravitationally
open adverb
open·ly \ˈō-pən-lē\ adverb
open·ness \-pə(n)-nəs\ noun
ADVERTISEMENT

Examples of OPEN

  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 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>.

Both liable and apt when followed by an infinitive are used nearly interchangeably with likely. Although conflicting advice has been given over the years, most current commentators accept apt when so used. They generally recommend limiting liable to situations having an undesirable outcome, and our evidence shows that in edited writing it is more often so used than not.

2open

verb

: 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

opened \ˈō-pənd, ˈō-pəmd\ open·ing \ˈōp-niŋ, ˈō-pə-\

Full Definition of OPEN

transitive verb
1
a :  to move (as a door) from a closed position
b :  to make available for entry or passage by turning back (as a barrier) or removing (as a cover or an obstruction)
2
a :  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
3
a :  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
4
a :  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>
6
a :  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 (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>
2
a :  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 2 <finally he opened freely on the subject>
6
a :  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·abil·i·ty \ˌōp-nə-ˈbi-lə-tē, ˌō-pə-\ noun
open·able \ˈōp-nə-bəl, ˈō-pə-\ adjective

Examples of OPEN

  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.

First Known Use of OPEN

before 12th century

3open

noun

: 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

Full Definition of OPEN

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

Examples of OPEN

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

First Known Use of OPEN

13th century
OPENABLE Defined for Kids

1open

adjective \ˈō-pən\

Definition of OPEN for Kids

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>
open·ly adverb
open·ness noun

2open

verb
openedopen·ing

Definition of OPEN for Kids

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 1, start <Police have opened an investigation.> <They opened fire on the enemy.>
open·er \ˈō-pə-nər, ˈōp-nər\ noun

3open

noun

Definition of OPEN for Kids

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

Browse

Next Word in the Dictionary: open–accessPrevious Word in the Dictionary: opeluAll Words Near: open
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears