Definition of "fill-in"
fill-in
noun
plural fill-ins
A temporary replacement for another, especially at a job.
Quotations
A question or puzzle in which one is expected to fill in a missing part of something.
Quotations
I would pick three or four activities each day from a list of: oral reading, silent reading, filmstrips on the text book subject, short quizzes, chapter tests, semester exams, quarter exams, review sheets, "find the word" puzzles, research papers with library visits, lectures, debates (about four times a year), phonograph records from the library downtown for the music of the time era we were studying, movies, field trips, spelling lists, match the date with the name lists, timelines, map fill-ins, etc.
2007, Gene A. Grant, The Adventures of Reverend Rocket, page 463
Something added to fill a gap.
Quotations
There were all kinds of different tips with varying widths of sprays—fat and skinny ones with special names. Fats were for fill-ins, and skinny tips usually for the outlines, unless you used a fat cap for a tag and attempted to “flare” the ends of your letters.
2007, Kelly Parra, Graffiti Girl, page 135
Something added to increase the size of something; padding or filler.
Quotations
Thus a film like René Laloux's Fantastic Planet (1973) clearly involves human or humanlike characters—yet the mode of presentation eschews historical fill-ins, and many of the events are hallucinatory rather than realistic.
2011, Istvan Csicsery-Ronay, Jr., The Seven Beauties of Science Fiction, page 258