fill-in

noun

1. 1

   A temporary replacement for another, especially at a job.

2. 2

   A substitution.

3. 3

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

4. 4

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

5. 5

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

6. 6

   Something added to fill a gap.

7. 7

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

8. 8

   A product category that is used to complete a range or variety of a product line.