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



BrE BrE//dɪə(r)//
; NAmE NAmE//dɪr//
(pl. deer) Wild mammals
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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 fallow deer, red deer, reindeer, roe deer, white-tailed deer, doe, fawn, stag See related entries: Wild mammals Word OriginOld English dēor, also originally denoting any four legged animal, used in the (now archaic) phrase small deer meaning ‘small creatures collectively’; of Germanic origin; related to Dutch dier, German Tier.
See the Oxford Advanced American Dictionary entry: deer