cracker Meaning, Definition & Usage

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

WordNet

Crack"er noun
Definitions
  1. One who, or that which, cracks.
  2. A noisy boaster; a swaggering fellow. Obs.
    What cracker is this same that deafs our ears? Shak.
  3. A small firework, consisting of a little powder inclossed in a thick paper cylinder with a fuse, and exploding with a sharp noise; -- often called firecracker.
  4. A thin, dry biscuit, often hard or crisp; as, a Boston cracker; a Graham cracker; a soda cracker; an oyster cracker.
  5. A nickname to designate a poor white in some parts of the Southern United States. Bartlett.
  6. (Zoöl.) The pintail duck.
  7. pl. (Mach.) A pair of fluted rolls for grinding caoutchouc. Knight.

Webster 1913