There are 2 definitions of fill in in English:

fill in1

Act as a substitute for someone when they are unable to do their job: my producer will have to have someone standing by to fill in for me
More example sentences
  • With Brooks absent because of a knock, the little-used Frost filled in at left-back.
  • In the absence of first-hand testimony, conjecture fills in.
  • Marky Ramone fills in on drums and former Black Flag member Dez Cadena slings guitar.
Synonyms
substitute, deputize, stand in, cover, provide cover, take over, act, act as deputy, act as stand-in, sit in, act as understudy, understudy, be a proxy, act as locum tenens; take the place of
North American informal pinch-hit
See parent entry: fill

Definition of fill in in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day anomalous
Pronunciation: əˈnämələs
adjective
deviating from what is standard, normal, or expected

There are 2 definitions of fill in in English:

fill-in2

Line breaks: fill-in

noun

A person or thing acting or serving in place of another; a substitute: she could be a competent short-term fill-in [as modifier]: a college student working as a fill-in doorman
More example sentences
  • What Margolis has said here is meaningless, a mere fill-in.
  • Seven years later, Cardinal Law reassigned Forry to a job as a roaming, fill-in priest to cover for priests on holiday.
  • The C-store market opens up new opportunities for grab-and-go dairy items, while continuing to serve as a fill-in grocery.

Definition of fill in in: