Definition of deer noun from the Oxford Advanced American Dictionary

 

deer

 noun
noun
NAmE//dɪr//
 
(pl. deer)
 
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an animal with long legs that eats grass, leaves, etc. and can run fast. Most male deer have antlers (= horns shaped like branches). There are many types of deer a herd of deer a deer park see also doe, fawn, red deer, reindeer, stag
See the Oxford Advanced Learner's Dictionary entry: deer