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English definition of “fill in”

fill in

phrasal verb with fill
 
 
/fɪl/ verb [T]
[T] to write or type information on a document in spaces that are provided for it: Companies will encourage customers to fill in questionnaires about themselves. Please print off a copy of the agreement, fill it in, sign it and send it back.
[I] to do the work of someone else for a short time: fill in for sb I asked Agnes to fill in for me while I went for lunch. When you're off sick, someone else has to fill in.
[T] to tell someone something they do not know, especially something that happened when they were not there: I haven't seen the latest report, so perhaps you could fill me in?fill sb in on sth Josh filled me in on what had been agreed at the meeting.
(Definition of fill in phrasal verb, verb from the Cambridge Business English Dictionary © Cambridge University Press)
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