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English definition of “start (sth) up”

start (sth) up

(ENGINE) phrasal verb with start     /stɑːt/ US  /stɑːrt/ verb
If a vehicle or engine starts up, or someone starts it up, it starts to work : The car wouldn't start up this morning .FunctioningPerforming a function
(Definition of start (sth) up (ENGINE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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