fill in

fill in

verb

Definition of FILL IN

1

to give information to <my friend quickly filled me in on the portion of the movie that I had missed>

Synonyms acquaint, advise, apprise, brief, catch up, clear, clue (in), familiarize, fill in, hip, inform, instruct, tell, verse, wise (up)

Related Words advertise, alert, notify; announce (to), disclose (to); assure, certify, convince, reassure, warrant; educate, lecture, school, teach, tutor; disabuse, disenchant, disillusion, undeceive

Near Antonyms misinform, mislead

2

to serve as a replacement usually for a time only <she's only filling in while the regular secretary is on vacation>

Synonyms fill in, pinch-hit, stand in, step in, sub, substitute, take over

Related Words understudy; relieve, spell; double (as)