a large, two-toed, swift-footed flightless bird, Struthio camelus, indigenous to Africa and Arabia, domesticated for its plumage: the largest of living birds.
(not used scientifically) a rhea.
a person who attempts to ignore unpleasant facts or situations.
Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease.