1. In mythology, a fabulous being, supposed to be half man and half horse. It has been supposed that this fancied monster originated among the Lapithae, a tribe in Thessaly, who first invented the art of breaking horses. But the origin of the fable and of the name is doubtful.

2. Part of a southern constellation, in form of a centaur, usually joined with the wolf, containing thirty-five stars; the archer.