Mounted soldiery; cavalry; used without the plural termination; as, a regiment of horse; distinguished from foot
When you talk about the horses, you mean horse races in which people bet money on the horse which they think will win. He still likes to bet on the horses
The horse does not appear in early examples of heraldry, although the winged horse is seen as the badge of the Order of the Temple A bay horse is known as a bayard, while the grey horse is a liard When the horse id displayed caparisoned; when in the field, he is free