Definitions of horse:

• noun:   solid-hoofed herbivorous quadruped domesticated since prehistoric times
• noun:   a padded gymnastic apparatus on legs
• noun:   a chessman in the shape of a horse's head; can move two squares horizontally and one vertically (or vice versa)
• noun:   a framework for holding wood that is being sawed
• noun:   troops trained to fight on horseback

  Example: "500 horse led the attack"

• verb:   provide with a horse or horses
• name:  A surname (very rare: popularity rank in the U.S.: #83622)