Bumper (noun)

1. A device or bar at the front or rear of a vehicle, designed to reduce damage in a collision.
2. A protective strip or bar on the front or rear of a vehicle to absorb shock in a collision.

Origin:

From bumper + -er, first recorded in the 19th century.

Examples:

1. The bumper of the car was dented in the accident.
2. He replaced the bumper on his truck.
3. The bumper was made of plastic.
4. The bumper sticker said "Honk if you love puppies".
5. The bumper guard helped protect the car from scratches.