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English definition of “flag”

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flag

verb
 
 
/flæɡ/ (-gg-)
[T] to put a mark on something or against something so it can be found easily among other similar things: Flag any files which might be useful later.
[T] IT to mark computer information with one of two possible values so that you can process it later: We'll flag the records of interest in the database and then we can give you a printout.
[I] to become tired, weaker, or less effective: We had been working on the presentation for six hours and I was beginning to flag. They denied that demand for the new product was flagging.
(Definition of flag verb from the Cambridge Business English Dictionary © Cambridge University Press)
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