- a person or thing that fills in, as a substitute, replacement, or insertion: The company used a fill-in for workers on vacation.
- a brief, informative summary; a rundown.
Origin of fill-in
First recorded in 1915–20; noun use of verb phrase fill in
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fill-in
He guested as a lay preacher on the Hour of Power and dabbled in talk radio as a fill-in for Boortz.Pizza Guy for President!
January 13, 2011
The largest number of fill-in wefts occurs roughly at a point about a third up from the end.Chincha Plain-weave cloths
Lila M. O'Neale