chimpanzee

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A gregarious anthropoid ape (Pan troglodytes) of tropical Africa, having long dark hair and somewhat arboreal habits and exhibiting humanlike behavior and a high degree of intelligence. It is now considered vulnerable to extinction in the wild.

Century Dictionary and Cyclopedia

1. n. A large West African ape, Troglodytes (or Anthropopithecus or Mimetes) niger, belonging to the anthropoid or man-like monkeys, of the family Simiidæ and suborder Anthropoidea, with dark blackish-brown hair, flesh-colored hands and feet, arms reaching to the knee, and very large ears, and like the orang in having the hair on its forearm turned backward, but differing from it in having an additional dorsal vertebra and a thirteenth pair of ribs. In its organization and form it presents a close resemblance to man. The structure of its lower extremities enables it to walk erect better than most of the apes, although its habits are in reality arboreal, and when on the ground it usually goes on all-fours. It feeds on fruits and nuts, lives in small societies, and constructs a sort of nest among the branches of trees. The height of a full-grown male chimpanzee is about four feet. This animal is most nearly related to the gorilla.

Wiktionary

1. n. A great ape of the genus Pan, native to Africa, and believed by biologists to be the closest extant relative to humans.

GNU Webster's 1913

1. n. (Zoöl.) An african ape (Pan troglodytes, formerly Anthropithecus troglodytes, or Troglodytes niger) which approaches more nearly to man, in most respects, than any other ape. It is the most intelligent of non-human animals, and when full grown, it is from three to four feet high. A variant called the pygmy chimpanzee, or bonobo, has been recently recognized as a separate species.

WordNet 3.0

1. n. intelligent somewhat arboreal ape of equatorial African forests