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English definition of “start (sth) up”

start (sth) up

(BUSINESS) phrasal verb with start     /stɑːt/ US  /stɑːrt/ verb
If a business or other organization starts up, or if someone starts one up, it is created and starts to operate : Many small businesses started up in the 1980s to cater to this growing market . We ought to start up a drama group .Starting, succeeding and failing in business
(Definition of start (sth) up (BUSINESS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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