Meaning of OPEN in English


I. ˈō-pən, -p ə m adjective

( open·er ˈōp-nər, ˈō-pə- ; open·est ˈōp-nəst, ˈō-pə-)

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

Date: before 12th century

1. : having no enclosing or confining barrier : accessible on all or nearly all sides

cattle grazing on an open range



(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


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


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


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



(1) : low 13

(2) : formed with the tongue in a lower position

Italian has an open and a close e


(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


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


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


a. : having openings, interruptions, or spaces

open mesh


(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


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



(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


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


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

Synonyms: see frank , liable

• open adverb

• open·ly ˈō-pən-lē adverb

• open·ness -pə(n)-nəs noun

II. verb

( opened ˈō-pənd, ˈō-p ə md ; open·ing ˈōp-niŋ, ˈō-pə-)

Date: before 12th century

transitive verb


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)


a. : to make available for or active in a regular function

open a new store

b. : to make accessible for a particular purpose

open ed new land for settlement

open the way for changes

c. : to initiate access to (a computer file) prior to use


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


a. : to make an opening in

open ed the boil

b. : to loosen and make less compact

open the soil

5. : to spread out : unfold

open ed the book


a. : to enter upon : begin

open ed 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 open ed early


a. : to spread out : expand

the wound open ed under the strain

b. : to become disclosed

a beautiful vista open ed before us

3. : to become enlightened or responsive

4. : to give access

the rooms open onto a hall

5. : speak out 2

finally he open ed freely on the subject


a. : to begin a course or activity

the play open s on Tuesday

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

III. noun

Date: 13th century

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

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.