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[fil-in] /ˈfɪlˌɪn/
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 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for fill-in
Contemporary Examples
Historical Examples
  • 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
Slang definitions & phrases for fill-in



  1. A summary account; information meant to supply what one does not know: A friend gives me a fill-in on how Costello is running the country (1945+)
  2. A substitute, esp a substitute worker: Get a fill-in, I gotta split (1920s+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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