- bumper - a glass filled to the brim (especially as a toast); "we quaffed a bumper of ale"
--1 is a kind of glass, drinking glass
- bumper - a mechanical device consisting of bars at either end of a vehicle to absorb shock and prevent serious damage
--2 is a kind of mechanical device
--2 is a part of
--2 has part: bumper guardcar, auto, automobile, machine, motorcar; truck, motortruck Derived form: verb bump1 - bumper - a mechanical device consisting of bars at either end of a vehicle to absorb shock and prevent serious damage