- The definition of a rear end is the back of something.
An example of rear end is your buttocks.
- To rear end is to hit the back of someone's vehicle.
An example of rear end is when your car hits the back of someone else's car.
The rear end of an elephant.
- the back part of something
- Slang the buttocks
- The rear part: the rear end of a car.
- Informal The buttocks.
transitive verbrear-end·ed, rear-end·ing, rear-ends Slang