noun
- the rear or back part or view of an object, person, scene, etc.; that part which is opposite the front.
- rump; buttocks.
noun
- the back of something
- (ˈbækˌsaɪd) informal the buttocks
c.1400, from back (adj.) + side (n.). In the specific sense of “rump, buttocks” it is first recorded c.1500.