Definitions

1. noun

a person who rides a bicycle, often in a recreational or competitive context

“The biker sped down the mountain trail, his tires screeching on the loose gravel.”

2. noun

a person who rides a motorcycle, often as a member of a motorcycle club or gang

“The biker club rode into town, their loud motorcycles drawing a crowd of onlookers.”

3. verb

to ride a bicycle or motorcycle, especially in a style that emphasizes speed or thrill-seeking

“He loves to biker down the winding roads of the countryside.”