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English definition of “open”

open

verb     /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 trading starts 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 big redundancies throughout the group .open discussions/negotiations/talks The union had not yet decided when to open negotiations with management .
[T] IT if you open a computer file , 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 . → Compare close (sth) down
open an account BANKING to enter into an agreement with a bank or other financial organization so that they look after your money : Open an internet savings account before the end of March and get a free mobile phone .
open your borders/markets COMMERCE to allow foreign countries to sell their goods and products in your country with fair conditions : The US threatened to put a 100 % tax on Japan's luxury cars 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 former Republican candidate 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 legal action could open the floodgates for customers to sue over high fees .
(Definition of open verb from the Cambridge Business English Dictionary © Cambridge University Press)
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