A person's buttocks; the bottom, the backside. Also: the anus; the rectum. Also occasionally: an animal's rump, anus, or rectum.

The rump or hind-quarters of a beast, esp. of a horse or other beast of burden.

The croup or rump of a horse or other animal; the buttocks or posteriors of the human body; transferred the hinder part of a thing; the crupper of…

The part of an animal's body to which the tail is attached; the (upper) hindquarters; (in birds) the lower back.

A tail, a rump.

= arse, n.

The buttocks, the rump. Also: the anus; †the cloaca of an animal (obsolete). Now humorous.

The hinder part of a person or animal; the buttocks, the rump. Now also: the anus. Now U.S. slang.

= senses 1, 2a; also in extended use.

transferred. The hinder parts of a beast; also of its skin or fleece: cf. breeching, n. 4.

In a horse, pig, etc.. The fleshy part of the buttock.

The posterior part of the abdomen, esp. in insects, crustaceans, etc.

(Arising out of a figurative use of sense 2) The buttocks of a person (chiefly humorous and slang) or animal; the hinder part of any creature.

British slang. More fully bottle and glass. = arse, n. 1a.

A person's buttocks; the bottom, the backside. Also: the anus; the rectum. Sometimes: an animal's rump, anus, or rectum. Cf. ding, n.8

A person's buttocks; the bottom, the backside. Also: an animal's rump. Cf. dinger, n.4