noun1. a. any of various head coverings, esp one with a brim and a shaped crown
b. (in combination)
hatrack
2. informal a role or capacity
3. at the drop of a hat
4. I'll eat my hat
5. hat in hand
6. keep something under one's hat
7. my hat
8. old hat
9. out of a hat
10. pass the hat round
11. take off one's hat to
12. talk through one's hat
13. throw one's hat at it
14. throw one's hat in the ring
verbWord forms: hats, hatting or hatted15. (transitive) to supply (a person, etc) with a hat or put a hat on (someone)