open Meaning in the Cambridge English Dictionary
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Meaning of “open” in the English Dictionary

"open" in British English

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uk   /ˈəʊ.pən/  us   /ˈoʊ-/

open adjective (NOT CLOSED)

A2 not ​closed or ​fastened: an open ​door/​window An open ​suitcaselay on her ​bed. You ​left the ​container open. Someone had ​left the ​window wide (= ​completely) open. He had several ​nasty open wounds (= those which had not ​begun to ​heal).
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open adjective (READY)

A1 [after verb] ready to be used or ​ready to ​provide a ​service: The ​supermarket is open till 8.00 p.m. The ​road is open now, but it is often ​blocked by ​snow in the ​winter. The new ​hospital was ​declared open by the ​mayor.
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open adjective (NOT ENCLOSED)

B1 not ​closed in or ​covered: It's not a good ​idea to ​camp in the ​middle of an open field (= one which is not ​covered with ​trees, ​bushes, etc.). Suddenly we had ​left the ​city behind and were out in open country. The ​survivors were ​adrift on the open sea (= ​far from ​land).
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open adjective (COMPUTER)

If a ​computerdocument or ​program is open, it is ​ready to be ​read or used: Make ​sure you have both ​files open at the same ​time.

open adjective (AVAILABLE)

C1 [after verb] available; not ​limited: There are still several ​possibilities open to you. The ​competition is open to anyone over the ​age of 16. Is the ​library open to the ​generalpublic? Their ​wholeattitude to these ​negotiations is open tocriticism (= can be ​criticized). I'd like to ​think I'm open to (= ​willing to ​consider) any ​reasonablesuggestion. An ​accident would lay the ​wholeissue of ​safety open (= ​cause it to be ​considered).
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open adjective (NOT SECRET)

C2 not ​secret: There has been open ​hostility between them ​ever since they had that ​argument last ​summer.C2 honest and not ​trying to ​keep things ​secret: He's very open about his weaknesses. I ​wish you'd be more open with me, and ​tell me what you're ​feeling. She has an ​honest, open ​face.
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open adjective (NOT DECIDED)

not ​decided or ​certain: We don't have to make a ​firmdecisionyet. Let's leave it open. We can ​leaveouroffer open for another ​week, but we have to have ​yourdecision by then. I ​want to ​keep my options open, so I'm not ​committing myself ​yet.


uk   /ˈəʊ.pən/  us   /ˈoʊ-/

open verb (BEGIN)

B2 [I or T] to (​cause to) ​begin: I would like to open my ​talk by giving a ​briefbackground to the ​subject. I'm going to open an ​account with another ​bank. The ​Olympic Games open ​tomorrow. A new ​radiostation is ​due to open (up) next ​month. The ​film opens (= will be ​shown for the first ​time) in New York and Los Angeles next ​week.
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open verb (NOT CLOSED)

A1 [I or T] to ​move something to a ​position that is not ​closed, or to make something ​change to a ​position that is not ​closed: Could you open the ​window, ​please? You can open ​youreyes now - here's ​yourpresent. The ​flowers open (out) in the ​morning but ​close again in the ​afternoon. From the ​kitchen there is a ​door that opens (out) into the ​garden. That ​door opens (out) onto the ​patio.informal "Open up (= open the ​door) - it's the ​police!" ​shouted the ​policeofficer, ​banging on the ​door.A2 [T] to ​remove or ​separatepart of a ​container or ​parcel so that you can ​see or use what it ​contains: Don't open a new ​bottle just for me. I couldn't ​wait to open the ​letter.
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open verb (READY)

A2 [I or T] If a ​shop or ​office opens at a ​particulartime of ​day, it ​starts to do ​business at that ​time: The ​coffeeshop opens at ten o'clock. He opens (up) his ​coffeeshop at ten o'clock.B2 [T] If someone, usually someone ​important, opens a ​building, ​event, etc., they ​officially say that it is ​ready to be used or to ​startoperating: The new ​hospital will be officially opened by the ​mayor on ​Tuesday.
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open verb (AVAILABLE)

[T] to make something ​available: This ​research opens (up) the ​possibility of being ​able to ​find a ​cure for the ​disease. The ​country is ​planning to open (up) ​itseconomy toforeigninvestment.
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open verb (COMPUTER)

B1 [T] If you open a ​computerdocument or ​program, you make it ​ready to ​read or use: To open a new ​document, ​click "File" and then ​click "New". Click the ​desktopicon to open the Cambridge Advanced Learner's Dictionary.

opennoun [S]

uk   /ˈəʊ.pən/  us   /ˈoʊ-/

open noun [S] (NOT ENCLOSED)

the open somewhereoutside, ​rather than in a ​building: It's good to be (out) in the open after being cooped up in an ​office all ​day.

open noun [S] (NOT SECRET)

bring sth out into the open to ​tellpeopleinformation that was ​secret: It's ​time this ​issue was ​brought out into the open.
(Definition of open from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"open" in American English

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openadjective, adverb [not gradable]

 us   /ˈoʊ·pən/

open adjective, adverb [not gradable] (POSITIONED FOR ACCESS)

being in a ​position that ​allows things to ​pass through or that ​allows for ​immediate use; not ​closed or ​fastened: The ​window was ​wide open. The ​trunk of his ​car had been ​pried open.


 us   /ˈoʊ·pən/

open adjective (READY FOR USE)

[not gradable] ready to be used or to ​provide a ​service: The ​supermarket is open till 9 p.m.

open adjective (NOT DECIDED)

not ​decided or ​certain: I ​want to ​keep my ​options open until I have all the ​facts. Whether we’ll go is still an open ​question. You should ​keep an open ​mind about ​your new ​school (= not ​form any ​opinions) until you’ve been there.

open adjective (NOT SECRET)

not ​secret: Open ​warfare had ​broken out in Yugoslavia. A ​person who is open is ​honest and not ​trying to ​hide something: He is ​quite open about his weaknesses.

open adjective (NOT COVERED)

not ​enclosed or ​covered: The ​park is one of the city’s ​largest open ​spaces.

open adjective (AVAILABLE)

[not gradable] available; not ​limited: Are there any ​positions open in the ​marketingdepartment? This ​library is open to the ​generalpublic. Their ​behavior at these ​negotiations is open to ​criticism (= can be ​criticized). I’m open to (= ​willing to ​consider) any ​reasonablesuggestion.
adverb  us   /ˈoʊ·pən·li/
She ​talked about her ​cancerquite openly.
noun [U]  us   /ˈoʊ·pən·nəs/
The ​agencyreleaseddetailedplans for ​greater openness and ​strongerstandards in the ​internationalmarketplace.

openverb [I/T]

 us   /ˈoʊ·pən/

open verb [I/T] (BEGIN)

to ​begin something or ​cause it to ​begin: [T] I would like to open the ​meeting by ​asking each of you to ​introduce yourself. [M] They’re opening up a new ​restaurant in about a ​month. [I] The ​film opens (= will be ​shown for the first ​time) next ​week.

open verb [I/T] (MAKE READY FOR USE)

to ​become or make something ​ready to ​provide a ​service: [I] The ​cleaners opens (up) around seven. [T] They opened the ​exhibit to the ​publicyesterday.
adjective [not gradable]  us   /ˈoʊ·pə·nɪŋ/
He made some opening ​remarks, then ​introduced the ​mainspeaker.
(Definition of open from the Cambridge Academic Content Dictionary © Cambridge University Press)

"open" in Business English

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uk   us   /ˈəʊpən/
COMMERCE if a ​shop, ​bank, ​office, etc. is open, its door are ​unlocked and it is doing ​business: Our ​offices are open from 9 to 5. The ​club has a liquor ​licenseallowing it to remain open until 2 a.m. The new ​airportterminal is now open for ​business.
STOCK MARKET if a ​financialmarket is open, ​investors can ​tradeshares, ​bonds, etc. on it: For the ​purposes of this ​agreement, a ​business day is any day that the New York Stock Exchange is open for ​business.
willing to consider something: open to sth A ​spokesman for the ​organization said they were open to a ​deal at the ​rightprice. open to ​offers/suggestions/​negotiation
available to be used, considered, etc. : open to sth Membership is open to all ​localbusinesses.leave the door/option/possibility open The ​appealscourtleft open the possibility that the ​computinggiant could be ​forced to ​change its ​businesspractices.
not ​secret or ​hidden from ​members, the ​public, etc.: open about sth After the ​economiccrisis, ​consumers expect ​banks to be more open and ​transparent about their ​lendingpolicies.
allowing everyone to ​share their ​ideas and ​information: open debate/dialogue/discussion These are complicated ​questions, and we welcome an open discussion about them. open ​communication
IT if a ​computerfile, ​document, or ​program is open, it is ​ready to be used: Make sure the ​file you're ​copying to is open before you ​click 'Paste'.
keep your options open to ​avoid doing or deciding something immediately in ​case there is a better ​opportunity to consider later: They are still ​keeping their ​options open but a ​merger is a ​strong possibility.
open court LAW a ​court of ​law where the details of a ​case are ​available to the ​public: The ​lawfirm didn't want the ​hearingsheld in open ​court because it feared the ​press would ​influencepublicopinion.
open question something which has not been decided yet: How ​voters will view this latest ​crisis remains an open ​question.
have/keep an open mind to wait until you know all the facts before ​forming an ​opinion or making a decision about something: The ​judge urged the ​jury to ​keep an open mind until they had heard all the ​evidence.


uk   us   /ˈəʊpən/
[I or T] COMMERCE to ​start doing ​business and ​dealing with ​customers : We open ​daily from 11 to 6.
[I or T] COMMERCE to ​start a new ​business: The Chicago-based coffee ​chain has opened ​branches in every ​major city in the UK.
[I] STOCK MARKET if ​shares, ​bonds, etc. open at a particular ​price or ​rate, that is the ​amount they are ​worth when ​tradingstarts that day: Share ​prices on the London Stock Exchange opened ​lower today.
[T] to ​start something: open a conference/meeting/proceedings The Chief Executive opened the ​meeting with an announcement of ​bigredundancies throughout the ​ discussions/negotiations/talks The ​union had not yet decided when to open ​negotiations with ​management.
[T] IT if you open a ​computerfile, ​document, or ​program you make it ​ready for you to ​start reading or ​working on: You can open the ​program from the ​menu or by double-clicking the ​icon.
open an account BANKING to ​enter into an ​agreement with a ​bank or other ​financialorganization so that they ​look after your ​money: Open an ​internetsavingsaccount before the end of March and get a ​freemobilephone.
open your borders/markets COMMERCE to ​allowforeign countries to ​sell their ​goods and ​products in your country with ​fairconditions: The US threatened to put a 100% ​tax on Japan's ​luxurycars unless it ​agreed to open its ​markets to US ​cars and ​parts.
open doors for sb (also open the door for sb) to make it possible for someone to do something: The ​formerRepublicancandidate was ​key in opening the door for more women to ​run for ​office in the US.
open the floodgates (to sb/sth) to make a lot of ​people do something by ​removing a ​rule that ​stopped it being possible before, especially when you do not want this to ​happen: Banks feared the ​legalaction could open the ​floodgates for ​customers to ​sue over high ​fees.
Phrasal verbs

opennoun [S]

uk   us   /ˈəʊpən/
STOCK MARKET the ​time when a ​stockmarket begins ​trading: Bonds ​rose at the open after a ​cut in German ​interestrates. Stocks ​fellheavily at the open of ​trading today.
(Definition of open from the Cambridge Business English Dictionary © Cambridge University Press)
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