Any ruminant of the genus Rangifer, of the Deer family, found in the colder parts of both the Eastern and Western hemispheres, and having long irregularly branched antlers, with the brow tines palmate.
A large Arctic deer, Rangifer tarandus, having branched antlers in both sexes, and capable of being domesticated unlike its wild caribou cousin. Reindeer provide meat, tools and clothing for the Sami. Today only 10% of Sami people can make their living herding reindeer.
an arctic animal with large antlers, thought to pull Santa's sleigh