a fast-running flightless African bird, Struthio camelus, that is the largest living bird, with stout two-toed feet and dark feathers, except on the naked head, neck, and legs: order Struthioniformes
ratite ▶ Related adjective: struthious
2. American ostrich
3.
a person who refuses to recognize the truth, reality, etc: a reference to the ostrich's supposed habit of burying its head in the sand