rocker

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. One that rocks, as:
2. n. A rocking chair.
3. n. A rocking horse.
4. n. One of the two curved pieces upon which a cradle, rocking chair, or similar device rocks.
5. n. A cradle used for washing or panning ores.
6. n. A small curved blade with a toothed edge used in mezzotint engraving to roughen the surface of the metal plate.
7. n. An object having a curved form, as the keel of a ship or a skate blade sharpened in a curve.
8. n. A curved stripe at the bottom part of a chevron worn by noncommissioned officers above the rank of sergeant.
9. n. Music A rock 'n' roll song, singer, or musician.
10. n. Music A fan of rock 'n' roll.
11. idiom. off (one's) rocker Slang Out of one's mind; crazy.

Century Dictionary and Cyclopedia

1. n. The rock-dove, Columba livia. Montagu. Also rockier, rock.
2. n. One who or that which rocks. Specifically— One who rocks a cradle.
3. n. The curved piece of wood on which a cradle or rocking-chair rocks.
4. n. A rocking-horse.
5. n. A rocking-chair.
6. n. In engraving, same as cradle, 4 .
7. n. A rocker-shaft.
8. n. In mining, same as cradle 4 .
9. n. In an electric-lamp regulator, a lever, pivoted in the middle, carrying at its extremities the armatures of two electromagnets, by the alternate attraction of which the carbon rods are made to separate or to approach each other.
10. n. A boat or yacht having a rocker keel.
11. n. A skate in which the bottom of the runner is not straight, but is convex from toe to heel.
12. n. A vessel for freezing chemical mixtures, essentially a freezer mounted on rockers.
13. n. In a railway gravel tip-car, a curved iron casting which supports the car-body, and on which the body rocks when the load is dumped.
14. n. One of two beams used in the body-frame of a carriage to support the floor-boards. See cut under barouche.
15. n. In pianoforte-making, the piece screwed to a key-tail to which the action-extension is fastened.
16. n. A tanning-vat in which the hides are rocked at intervals to facilitate tanning.

Wiktionary

1. n. A curved piece of wood attached to the bottom of a rocking chair or cradle that enables it to rock back and forth.
2. n. Hence, a rocking chair
3. n. surfing The lengthwise curvature of a surfboard. (More rocker is a more curved board.)
4. n. Someone passionate about rock music.
5. n. A musician who plays rock music
6. n. One who rocks something.
7. n. UK A member of a British subculture of the 1960s, opposed to the mods, who dressed in black leather and were interested in 1950s music.

GNU Webster's 1913

1. n. One who rocks; specifically, one who rocks a cradle.
2. n. One of the curving pieces of wood or metal on which a cradle, chair, etc., rocks.
3. n. Any implement or machine working with a rocking motion, as a trough mounted on rockers for separating gold dust from gravel, etc., by agitation in water.
4. n. A play horse on rockers; a rocking-horse.
5. n. A chair mounted on rockers; a rocking-chair.
6. n. A skate with a curved blade, somewhat resembling in shape the rocker of a cradle.
7. n. (Mach.) Same as Rock shaft.

WordNet 3.0

1. n. a performer or composer or fan of rock music
2. n. a chair mounted on rockers
3. n. an ice skate with a curved blade
4. n. an attendant who rocks a child in a cradle
5. n. a teenager or young adult in the 1960s who wore leather jackets and rode motorcycles
6. n. a curved support that permits the supported object to rock to and fro
7. n. a trough that can be rocked back and forth; used by gold miners to shake auriferous earth in water in order to separate the gold