- (countable) A bumper is a bar at the front or back of a vehicle to reduce damage in a crash.
- The car's front bumper was dented in the accident.
- (informal) A bumper is something unusually large or abundant.
- The farmers celebrated a bumper crop of apples this year.
- (usually before a noun) A bumper crop, year, season, harvest, etc., is larger or better than usual.
- With the rain in the spring and the warm summer, we've had a bumper crop.
- The store is having a bumper sale this weekend.