Definitions

1. verb

to ride or be on the back of something, especially a horse, bicycle, or other vehicle

“The horse had been ridden by a young girl.”

2. noun

a part of a wave or a swell that has been ridden by a surfer

“The surfer caught a great ridden on the beach break.”

3. past participle

having been ridden or mounted

“The horse was ridden hard today.”