Definition of "fill-in" in English

noun

1. A temporary replacement for another, especially at a job.

2. A substitution.

3. (mathematics) An intermediate result that must be stored temporarily during the course of a sparse matrix computation.

4. A question or puzzle in which one is expected to fill in a missing part of something.

5. (music) A musical embellishment (usually percussion) that is added to connect musical phrases.

6. Something added to fill a gap.

7. Something added to increase the size of something; padding or filler.

8. (marketing) A product category that is used to complete a range or variety of a product line.