n. 25B6; noun
the rear of the building : BACK (PART), hind part, back end; Nautical stern.
the rear of the queue : (TAIL) END, rear end, back end, tail; N. Amer. tag end.
he slapped her on the rear. : See bottom noun sense 6.
25B6; adjective the rear bumper : BACK, end, rearmost; hind, hinder, hindmost; technical posterior.