1. Noun.  an African animal, closely related to a horse, with black and white stripes.
  2. Noun.  (context, sports) a referee.
  3. Noun.  (context, medicine) an unlikely diagnosis, especially for symptoms probably caused by a common ailment. (Originates in the advice often given to medical students: "When you hear hoof beats, think of horses, not zebras.").
  4. Noun.  (context, vulgar) a bi-racial person, specifically one born to a member of the Sub-Saharan African race and a Caucasian.

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This entry was last updated on RefTopia from its source on 3/20/2012.