- any of several ruminants of the family Cervidae, most of the males of which have solid, deciduous antlers.
- any of the smaller species of this family, as distinguished from the moose, elk, etc.
- any ruminant artiodactyl mammal of the family Cervidae, including reindeer, elk, muntjacs, and roe deer, typically having antlers in the male
- (in N Canada) another name for caribou
