'Mangabey' definitions:

Definition of 'mangabey'

(from WordNet)
noun
Large agile arboreal monkey with long limbs and tail and white upper eyelids

Definition of 'Mangabey'

From: GCIDE
  • Mangabey \Man"ga*bey\, n. [So called by Buffon from Mangaby, in Madagascar, where he erroneously supposed them be native.] (Zool.) Any one of several African monkeys of the genus Cercocebus, as the sooty mangabey (Cercocebus fuliginosus), which is sooty black. [Also written mangaby.] [1913 Webster]