from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various tropical Old World birds of the family Bucerotidae, having a very large bill often surmounted by an enlarged protuberance at the base.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of various birds of the family Bucerotidae, with bills resembling a cow's horn. Many species have a casque above the bill, and many imprison their young in a tree.
from the GNU version of the Collaborative International Dictionary of English
- n. Any bird of the family Bucerotidæ, of which about sixty species are known, belonging to numerous genera. They inhabit the tropical parts of Asia, Africa, and the East Indies, and are remarkable for having a more or less horn-like protuberance, which is usually large and hollow and is situated on the upper side of the beak. The size of the hornbill varies from that of a pigeon to that of a raven, or even larger. They feed chiefly upon fruit, but some species eat dead animals.
from The Century Dictionary and Cyclopedia
- n. A large non-passerine bird of the family Bucerotidæ: so called from the horny casque, in some cases of enormous size, which surmounts the bill.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. bird of tropical Africa and Asia having a very large bill surmounted by a bony protuberance; related to kingfishers
From horn + bill (Wiktionary)