| Noun | 1. | caribou - arctic deer with large antlers in both sexes; called reindeer in Eurasia and caribou in North Americacervid, deer - distinguished from Bovidae by the male's having solid deciduous antlers Rangifer caribou, woodland caribou - any of several large caribou living in coniferous forests of southern Canada; in some classifications included in the species Rangifer tarandus | |