hat

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A covering for the head, especially one with a shaped crown and brim.
2. n. A head covering of distinctive color and shape worn as a symbol of office.
3. n. The office symbolized by the wearing of such a head covering.
4. n. A role or office symbolized by or as if by the wearing of different hats: wears two hats—one as parent and one as corporate executive.
5. v. To supply or cover with a hat.
6. idiom. at the drop of a hat At the slightest pretext or provocation.
7. idiom. hat in hand In a humble manner; humbly.
8. idiom. take (one's) hat off to To respect, admire, or congratulate.
9. idiom. talk through (one's) hat To talk nonsense.
10. idiom. talk through (one's) hat To bluff.
11. idiom. throw To enter a political race as a candidate for office.
12. idiom. under (one's) hat As a secret or in confidence: Keep this information under your hat.

Century Dictionary and Cyclopedia

1. n. A covering for the head; specifically, a head-dress worn in the open air, having a crown, sides, and a brim. Hats are made of various materials, as felt, silk, wool, straw, etc., and vary greatly in form and style; and they are worn, with characteristic differences of shape, by both men and women. Bonnets are sometimes loosely called hats.
2. n. The layer of tan-bark spread over hides in a tan-pit.
3. n. In a smelting-furnace, a depressed place in the tunnel-head designed to detain gases.
4. n. In some soap-coppers and the like, a depressed chamber in the bottom, provided with a tap for drawing off the contents: designed to collect impurities that settle.
5. n. In heraldry, a representation of the red hat, having the tassels on each side arranged as described under cordon.
6. To provide with a hat: used chiefly in composition: as, straw-hatted girls.
7. To place a hat upon the head of.
8. To secure, as a seat, by placing one's hat upon it, as is done in the British House of Commons.
9. A Middle English form of hot.
10. n. An obsolete form of hate.
11. n. See hot.
12. n. In botany, the pileus or cap of a mushroom.

Wiktionary

1. n. A covering for the head, often in the approximate form of cone or a cylinder closed at its top end, and sometimes having a brim and other decoration.
2. n. figuratively A particular role or capacity that a person might fill.
3. n. figuratively Any receptacle from which numbers/names are pulled out in a lottery.
4. n. figuratively, by extension The lottery or draw itself.
5. n. video games A hat switch.
6. n. typography, nonstandard, rare = háček

GNU Webster's 1913

1. adj. obsolete Hot.
2. obsolete, obsolete sing. pres. of hote to be called. Cf.
3. n. A covering for the head; esp., one with a crown and brim, made of various materials, and worn by men or women for protecting the head from the sun or weather, or for ornament.

WordNet 3.0

1. v. put on or wear a hat
2. n. headdress that protects the head from bad weather; has shaped crown and usually a brim
3. n. an informal term for a person's role
4. v. furnish with a hat