Horse | Definition, Breeds, Pictures, Evolution, & Facts britannica.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from britannica.com Daily Mail and Mail on Sunday newspapers.
Horse, a hoofed herbivorous mammal of the family Equidae. It comprises a single species, Equus caballus, divided into numerous varieties. Between about 6,000 years ago, when it was domesticated, and the emergence of mechanized vehicles, it was used as a draft animal and as one of the chief means of transportation.