Real Dictionary

chimpanzee
countable noun: A chimpanzee is a kind of small African ape.

chimpanzee in American English
any of a genus (Pan) of great apes of Africa, with black hair and large, protruding ears: it is smaller than a gorilla and is noted for its intelligence
noun: a large, somewhat arboreal anthropoid ape, Pan troglodytes, of equatorial Africa, having a brown-to-black coat, a relatively hairless face with a rounded muzzle, prominent ears, and hands adapted for knuckle-walking, noted for its intelligence and humanli

chimpanzee in British English
noun: a gregarious and intelligent anthropoid ape, Pan troglodytes, inhabiting forests in central W Africa