cracker

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A thin crisp wafer or biscuit, usually made of unsweetened dough.
2. n. One that cracks, especially:
3. n. A firecracker.
4. n. A small cardboard cylinder covered with decorative paper that holds candy or a party favor and pops when a paper strip is pulled at one or both ends and torn.
5. n. The apparatus used in the cracking of petroleum.
6. n. One who makes unauthorized use of a computer, especially to tamper with data or programs.
7. n. Offensive Used as a disparaging term for a poor white person of the rural, especially southeast United States.
8. n. Offensive Used as a disparaging term for a white person.

Century Dictionary and Cyclopedia

1. n. One who or that which cracks or breaks (transitively). Specifically— In flint-manuf., a man who breaks the flint stones into flakes, and sorts the fragments according to size.
2. n. One who or that which cracks (intransitively). Specifically— A small kind of firework filled with powder or combustible matter, which explodes with a smart crack or with a series of sharp noises in quick succession; a fire-cracker.
3. n. A boast; a lie.
4. n. A thin hard or crisp biscuit.
5. n. A bird, the pintail duck, Dafila acuta.
6. n. plural The parrots as an order, Enucleatores.
7. n. One of an inferior class of white hill-dwellers in some of the southern United States, especially in Georgia and Florida. The name is said to have been applied because cracked corn is their chief article of diet; it is as old in Georgia and Florida as the times of the revolution. Also called sand-hitter.

Wiktionary

1. n. A dry, thin, crispy, and usually salty or savory biscuit.
2. n. A short piece of twisted string tied to the end of a whip that creates the distinctive sound when the whip is thrown or cracked.
3. n. A firecracker.
4. n. A person or thing that cracks, or that cracks a thing (e.g. whip cracker; nutcracker).
5. n. A Christmas cracker
6. n. Refinery equipment used to pyrolyse organic feedstocks. If catalyst is used to aid pyrolysis it is informally called a cat-cracker
7. n. chiefly UK A fine thing or person (crackerjack).
8. n. An ambitious or hard-working person (i.e. someone who arises at the 'crack' of dawn).
9. n. computing One who cracks (i.e. overcomes) computer software or security restrictions.
10. n. obsolete A noisy boaster; a swaggering fellow.
11. n. The pintail duck.
12. n. obsolete A pair of fluted rolls for grinding caoutchouc.
13. n. US, pejorative, ethnic slur An impoverished white person from the southeastern United States, originally associated with Georgia and parts of Florida; by extension: any white person.

GNU Webster's 1913

1. n. One who, or that which, cracks.
2. n. obsolete A noisy boaster; a swaggering fellow.
3. n. A small firework, consisting of a little powder inclosed in a thick paper cylinder with a fuse, and exploding with a sharp noise; -- usually called firecracker.
4. n. A thin, dry biscuit, often hard or crisp.
5. n. A nickname to designate a poor white in some parts of the Southern United States.
6. n. (Zoöl.) The pintail duck.
7. n. (Mach.) A pair of fluted rolls for grinding caoutchouc.

WordNet 3.0

1. n. a thin crisp wafer made of flour and water with or without leavening and shortening; unsweetened or semisweet
2. n. a programmer who cracks (gains unauthorized access to) computers, typically to do malicious things
3. n. firework consisting of a small explosive charge and fuse in a heavy paper casing
4. n. a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends
5. n. a poor White person in the southern United States