A large, solid-hoofed, herbivorous quadruped, domesticated since prehistoric times, used for riding, carrying, and pulling loads. The horse galloped across the field with grace and speed.
A frame or structure on which something is mounted or supported, often used in the context of carpentry or gymnastics. The gymnast performed a routine on the pommel horse.
He struggled with addiction and was trying to quit using horse.
Informal: the knight chess piece. He advanced his horse to f3 to threaten the queen.