American English

Definition of crab noun from the Oxford Advanced American Dictionary



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  1. 1[countable] a sea creature with a hard shell, eight legs, and two pincers (= curved and pointed arms for catching and holding things). Crabs move sideways on land. see also hermit crab
  2. 2[uncountable] meat from a crab, used for food dressed crab
  3. 3crabs (informal) the condition caused by having lice (calledcrab lice) in the hair around the genitals
See the Oxford Advanced Learner's Dictionary entry: crab