Bike (noun)

1. A vehicle with two wheels, one behind the other, that is propelled by pedals and steered with handlebars attached to the front wheel.
2. A bicycle.

Origin:

Shortening of bicycle, which first appeared in the late 19th century.

Examples:

1. He was riding his bike to work.
2. She was fixing her bike.
3. The bike had a flat tire.
4. He was teaching his son to ride a bike.
5. The bike trail was crowded on the weekends.