Definitions
1.nounA dry, thin, crispy baked bread (usually salty or savoury, but sometimes sweet, as in the case of graham crackers and animal crackers).
2.nounA 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.nounA firecracker.
4.nounA person or thing that cracks, or that cracks a thing (e.g. whip cracker; nutcracker).
5.nounA Christmas cracker.
6.nounRefinery equipment used to pyrolyse organic feedstocks. If catalyst is used to aid pyrolysis it is informally called a cat-cracker
7.nounA fine thing or person (crackerjack)."She's an absolute cracker!"
8.nounAn ambitious or hard-working person (i.e. someone who arises at the 'crack' of dawn).
9.nounOne who cracks (i.e. overcomes) computer software or security restrictions.
10.nounA noisy boaster; a swaggering fellow.
11.noun(racial slur) An impoverished white person from the southeastern United States, originally associated with Georgia and parts of Florida; (by extension) any white person.
12.noun(Florida) A police officer.
13.nounA northern pintail, species of dabbling duck.
14.nounA pair of fluted rolls for grinding caoutchouc.