'Baboon' definitions:

Definition of 'baboon'

From: WordNet
noun
Large terrestrial monkeys having doglike muzzles

Definition of 'Baboon'

From: GCIDE
  • Baboon \Bab*oon"\, n. [OE. babewin, baboin, fr. F. babouin, or LL. babewynus. Of unknown origin; cf. D. baviaan, G. pavian, baboon, F. babine lip of ape, dogs, etc., dial. G. b[aum]ppe mouth.] (Zool.) One of the Old World Quadrumana, of the genera Cynocephalus and Papio; the dog-faced ape. Baboons have dog-like muzzles and large canine teeth, cheek pouches, a short tail, and naked callosities on the buttocks. They are mostly African. See Mandrill, and Chacma, and Drill an ape. [1913 Webster]