Definition of crab noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//kræb//
    ; NAmE NAmE//kræb//
    Meat, Invertebrates
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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 See related entries: Invertebrates
  2. 2 [uncountable] meat from a crab, used for food dressed crab See related entries: Meat
  3. 3crabs (informal) the condition caused by having lice (called crab lice) in the hair around the genitals
  4. Word OriginOld English crabba, of Germanic origin; related to Dutch krabbe, and more distantly to Dutch kreeft and German Krebs; also to crab in the sense to grumble.
See the Oxford Advanced American Dictionary entry: crab