As a Noun:
1. A large animal which you can ride. They are often used for transport or for pulling ploughs and carts. English = horse.
2. The activity of riding horses, or any large animal. English = horse riding.
As a Verb or Adjective:
1. To be sitting on a horse, or any large animal. English = straddle.
2. To ride on a horse, or any large animal.