bonnet

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A hat of cloth or straw, held in place by ribbons tied under the chin, that is worn by women and children.
2. n. Scots A brimless cap worn by men or boys.
3. n. A removable metal plate over a machine part, such as a valve.
4. n. Chiefly British The hood of an automobile.
5. n. A windscreen for a chimney.
6. n. A cover for a fireplace.
7. n. Nautical A strip of canvas laced to a fore-and-aft sail to increase sail area.
8. v. To put a bonnet on.

Century Dictionary and Cyclopedia

1. n. A covering for the head, worn by men and boys, and differing from a hat chiefly in having no brim; a cap, usually of some soft material. In Scotland the term is applied to any kind of cap worn by men, but specifically to the distinctively Scotch closely woven and seamless caps of wool, usually of a dark-blue color, known as glengarrys (worn by the Highland regiments in undress uniform), balmorals, braid bonnets, kilmarnocks, etc.
2. n. A form of hat or head-covering worn by women out of doors. It incloses the head more or less at the sides and generally the back, and is usually trimmed with some elaborateness, and tied on the head with ribbons. It differs from a hat of ordinary form especially in having no brim.
3. n. The cap, usually of velvet, within the metallic part of a crown, covering the head when the crown is worn.
4. n. In fortification, a small work with two faces, having only a parapet with two rows of palisades about 10 or 12 feet apart. Generally it is raised above the salient angle of the connterscarp, and communicates with the covered way. Its object is to retard a lodgment by besiegers, or to prevent one from being made.
5. n. Nautical, an addition to a sail, or an additional part laced to the foot of a sail.
6. n. A cast-iron plate covering the openings in the valve-chambers of a pump.
7. n. A frame of wire netting over the chimney of a locomotive engine to prevent the escape of sparks: used chiefly in engines which burn wood.
8. n. In mining, a shield or cover over the cage to protect the miners in case anything should fall down the shaft.
9. n. A cowl or wind-cap for a chimney; a hood for ventilation.
10. n. The hood over the platform of railroad-car.
11. n. A sliding lid or cover for a hole in an iron pipe.
12. n. A protuberance occurring chiefly on the snout of one of the right whales. It appears to be primitively smooth, but becomes honeycombed by the barnacles which attach themselves to it.
13. n. A decoy; a player at a gaming-table, or bidder at an auction, whose business it is to lure others to play or buy: so called because such a person figuratively bonnets or blinds the eyes of the victims.
14. n. A local name in Florida of the yellow water-lily, Nuphar advena.
15. To force the bonnet or hat over the eyes of, with the view of mobbing or hustling.
16. To pull off the bonnet; make obeisance.
17. n. A portion of a coal-seam left for a roof.
18. n. A flat piece of wood on the top of a prop.
19. n. plural Gas-coal or shale overlying a coal-seam or worked with it.
20. n. The lid or cover of a hole by which access may be had to valves or other apparatus in a closed chamber.
21. n. The protecting hood over the machinery or motor of a motor-vehicle, in front of the dashboard.
22. n. The plate on the motor-crank case, or on the transmission gear, normally closed, through which the cranks and gears of a motor-car can be inspected and cleaned and oiled.
23. n. plural The spatter-dock, Nymphæa advena and the other species. See Nymphæa, 1.
24. To provide with an iron shield or bonnet: as, to bonnet a safety-lamp.

Wiktionary

1. n. A type of hat, once worn by women or children, held in place by ribbons tied under the chin.
2. n. A traditional Scottish woollen brimless cap; a bunnet.
3. n. by extension The polishing head of a power buffer, often made of wool.
4. n. Australia, UK, New Zealand, South Africa, automotive The hinged cover over the engine of a motor car; a hood.
5. n. nautical A length of canvas attached to a fore-and-aft sail to increase the pulling power.
6. v. obsolete To take off the bonnet or cap as a mark of respect; to uncover.

GNU Webster's 1913

1. n. obsolete A headdress for men and boys; a cap.
2. n. A soft, elastic, very durable cap, made of thick, seamless woolen stuff, and worn by men in Scotland.
3. n. A covering for the head, worn by women, usually protecting more or less the back and sides of the head, but no part of the forehead. The shape of the bonnet varies greatly at different times; formerly the front part projected, and spread outward, like the mouth of a funnel.
4. n. Anything resembling a bonnet in shape or use.
5. n. (Fort.) A small defense work at a salient angle; or a part of a parapet elevated to screen the other part from enfilade fire.
6. n. A metallic canopy, or projection, over an opening, as a fireplace, or a cowl or hood to increase the draught of a chimney, etc.
7. n. A frame of wire netting over a locomotive chimney, to prevent escape of sparks.
8. n. A roofing over the cage of a mine, to protect its occupants from objects falling down the shaft.
9. n. In pumps, a metal covering for the openings in the valve chambers.
10. n. (Naut.) An additional piece of canvas laced to the foot of a jib or foresail in moderate winds.
11. n. The second stomach of a ruminating animal.
12. n. Cant An accomplice of a gambler, auctioneer, etc., who entices others to bet or to bid; a decoy.
13. n. (Automobiles), Brit. The metal cover or shield over the motor; predominantly British usage. In the U.S. it is called the hood.
14. v. obsolete To take off the bonnet or cap as a mark of respect; to uncover.

WordNet 3.0

1. n. a hat tied under the chin
2. n. protective covering consisting of a metal part that covers the engine
3. v. dress in a bonnet