sitter: Meaning and Definition of

sit•ter

1. a person who sits.
2. a brooding hen.
3. a person who stays with young children while the parents go out; baby-sitter.
4. a person who provides routine or custodial care temporarily or part-time, as for an elderly person or a pet whose owner is on vacation.
5. the buttocks; rump.

Sit•ter

1. 1872–1934, Dutch astronomer and mathematician.