1. a hammer used for pounding

2. a machine tool that pounds

3. a hammer-shaped tool used to hit something, such as a gavel

4. a rapper; a door knocker

5. a piano or dulcimer hammer (music)

6. the malleus (anatomy)

7. a throwing hammer (athletics)

8. a hammer with bas relief marks used to create imprints on wood, leather etc. (technical)

9. the advantage of throwing the last stone (curling)

10. the part of a clock that strikes the bell (clockmaking)