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any primateprimate,
member of the mammalian order Primates, which includes humans, apes, monkeys, and prosimians, or lower primates. The group can be traced to the late Cretaceous period, where members were forest dwellers.
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 of the subfamily Hominoidea, with the possible exception of humans. The small apes, the gibbongibbon,
small ape, genus Hyloblates, found in the forests of SE Asia. The gibbons, including the siamang, are known as the small, or lesser, apes; they are the most highly adapted of the apes to arboreal life. Gibbons are about 3 ft (90 cm) tall and weigh about 15 lb (6.
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 and the siamang, and the orangutanorangutan
, an ape, Pongo pygmaeus, found in swampy coastal forests of Borneo and Sumatra. Highly specialized for arboreal life, it usually travels by grasping branches with hands and feet and moving from tree to tree. Adult males are about 4 1-2 ft (1.
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, one of the great apes, are found in SE Asia. The other great apes, the gorillagorilla,
an ape, Gorilla gorilla, native to the lowland and mountain forests of western and central equatorial Africa. It is the largest of the apes, the males reaching a height of 5 to 6 ft (150–190 cm) with a 9-ft (144–cm) arm spread.
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 and the chimpanzeechimpanzee,
an ape, genus Pan, of the equatorial forests of central and W Africa. The common chimpanzee, Pan troglodytes, lives N of the Congo River. Full-grown animals of this species are up to 5 ft (1.
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 and closely related bonobobonobo,
smaller of two species of chimpanzee, genus Pan. Whereas the common chimpanzee, P. troglodytes, lives in forests across most of equatorial Africa, the bonobo, P.
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, are found in Africa. The term ape was formerly and incorrectly applied to certain tailless monkeys. Ape and anthropoid ape are now used synonymously, although the common names of certain monkeys still contain the word ape; for example, the N African macaque is called the Barbary ape.

True apes vary in size from the 3–ft (90–cm), 15–lb (6.8–kg) gibbon to the 6–ft (1.8–m), 450–lb (200–kg) gorilla. All apes are forest dwellers and most spend at least some of the time in trees. Except for adult gorillas, they can run along branches on all fours; they are also able to move about by brachiation, or arm-over-arm swinging. Gibbons (including siamangs) are particularly adept at this type of locomotion; the heavier orangutan prefers to grasp a neighboring tree and pull itself across to it. Gorillas and chimpanzees are the most terrestrial of the apes, normally traveling on all fours by leaning on the knuckles of their forelimbs with the fingers of their hands curled under (knuckle-walking); orangutans ball their fingers into fists during the short periods they walk. Most apes are able to walk on two feet for short distances.

The skeleton of an ape is quite similar to that of a human in the structure of the chest and shoulders. Apes have broad, flat chests and arms capable of reaching up and backward from the shoulder; this construction is associated with brachiation. The pelvis, on the other hand, is more like that of a monkey, designed for walking on all fours, hence the use of knuckle-walking for ground locomotion. The arms of an ape are longer than the legs. The hands are similar to human hands, but with fingers and thumb of more equal length; the feet are handlike, grasping structures. Apes have neither tails nor the cheek pouches found in Old World monkeys; gibbons are the only apes that have the buttock callosities found in Old World monkeys. Like other anthropoid primates, the eyes are highly developed, with stereoscopic color vision. The brains of great apes are different from old world monkeys and some structures are reminiscent of the uniquely elaborate features of the human cortex, rendering these primates capable of fairly advanced reasoning. Chimpanzees, bonobos, orangutans, and gorillas have been observed using objects as tools in the wild.

Estimates of the amount of identical genetic material (DNA) in chimpanzees and humans range from 94.6% to 99.4%. This marked similarity, and additional evidence, have led primatologists to suggest that the taxonomy of the apes should include three groups: hylobatidae (gibbons and siamangs); pongidae (orangutangs); and hominidae (gorillas, chimpanzees, and humans). Apes are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Mammalia, order Primates.


See S. Montgomery, Walking with the Great Apes (1991).



a city in Aluksne Raion, Latvian SSR, located 177 km northeast of Riga, near the border of the Estonian SSR. Ape has a railroad station on the narrow-gauge Valga-Gulbene line. Population, 2,600 (1968). Industry consists of woodworking and food-processing. Ape arose in the second half of the 19th century and received the status of a city in 1928.

What does it mean when you dream about an ape?

As our closest animal relatives, apes can represent the natural, instinctual wisdom that most of us have lost, particularly if the dream animal is a gray-haired ape. We also sometimes associate simians (especially chimpanzees) with humor, and with the “chained up” animal self inside (e.g., King Kong). “Ape” can also mean to mimic.


(vertebrate zoology)
Any of the tailless primates of the families Hylobatidae and Pongidae in the same superfamily as humans.


1. any of various primates, esp those of the family Pongidae (see anthropoid ape), in which the tail is very short or absent
2. any monkey


(audio, compression)
A lossless audio compression algorithm from MonkeysAudio.


A graphics package from the Ohio Supercomputer Centre.