The Collaborative International Dictionary of English v.0.48:

Ape \Ape\ ([=a]p), n. [AS. apa; akin to D. aap, OHG. affo, G.
   affe, Icel. api, Sw. apa, Dan. abe, W. epa.]
   1. (Zool.) A quadrumanous mammal, esp. of the family
      Simiad[ae], having teeth of the same number and form as
      in man, and possessing neither a tail nor cheek pouches.
      The name is applied esp. to species of the genus
      Hylobates, and is sometimes used as a general term for
      all Quadrumana. The higher forms, the gorilla, chimpanzee,
      and ourang, are often called anthropoid apes or man
      apes.
      [1913 Webster]

   Note: The ape of the Old Testament was probably the rhesus
         monkey of India, and allied forms.
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   2. One who imitates servilely (in allusion to the manners of
      the ape); a mimic. --Byron.
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   3. A dupe. [Obs.] --Chaucer.
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