n. A small ape of the family Hylobatidae with long limbs, which it uses to travel through rainforests by swinging from branch to branch.
the GNU version of the Collaborative International Dictionary of English
n. Any arboreal ape of the genus Hylobates, of which many species and varieties inhabit the East Indies and Southern Asia. They are tailless and without cheek pouches, and have very long arms, adapted for climbing.
The Century Dictionary and Cyclopedia
n. The common name of the long-armed apes of the genus Hylobates, subfamily Hylobatinæ, and family Simiidæ.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. English historian best known for his history of the Roman Empire (1737-1794)
n. smallest and most perfectly anthropoid arboreal ape having long arms and no tail; of southern Asia and East Indies
Word Usage
"Someone yesterday asked (don't know who it was, as it was an anonymous post, though she did say she was from Canada) what a gibbon is - this is not some obscure English quilting term - this is the stuffed toy on Sarah's postcard - it's a kind of monkey with long arms."