'Deer' definitions:

Definition of 'deer'

From: WordNet
noun
Distinguished from Bovidae by the male's having solid deciduous antlers [syn: deer, cervid]

Definition of 'Deer'

From: GCIDE
  • Deer \Deer\ (d[=e]r), n. sing. & pl. [OE. der, deor, animal, wild animal, AS. de['o]r; akin to D. dier, OFries. diar, G. thier, tier, Icel. d[=y]r, Dan. dyr, Sw. djur, Goth. dius; of unknown origin. [root]71.]
  • 1. Any animal; especially, a wild animal. [Obs.] --Chaucer. [1913 Webster]
  • Mice and rats, and such small deer. --Shak. [1913 Webster]
  • The camel, that great deer. --Lindisfarne MS. [1913 Webster]
  • 2. (Zool.) A ruminant of the genus Cervus, of many species, and of related genera of the family Cervid[ae]. The males, and in some species the females, have solid antlers, often much branched, which are shed annually. Their flesh, for which they are hunted, is called venison. [1913 Webster]
  • Note: The deer hunted in England is Cervus elaphus, called also stag or red deer; the fallow deer is {Cervus dama}; the common American deer is {Cervus Virginianus}; the blacktailed deer of Western North America is Cervus Columbianus; and the mule deer of the same region is Cervus macrotis. See Axis, Fallow deer, Mule deer, Reindeer. [1913 Webster]
  • Note: Deer is much used adjectively, or as the first part of a compound; as, deerkiller, deerslayer, deerslaying, deer hunting, deer stealing, deerlike, etc. [1913 Webster]
  • Deer mouse (Zool.), the white-footed mouse ({Peromyscus leucopus}, formerly Hesperomys leucopus) of America.
  • Small deer, petty game, not worth pursuing; -- used metaphorically. (See citation from Shakespeare under the first definition, above.) "Minor critics . . . can find leisure for the chase of such small deer." --G. P. Marsh. [1913 Webster]