Definition of "hornbill" [horn•bill]

• 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. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In terms of casque morphology, the most strongly modified hornbill is the Helmeted hornbill Rhinoplax vigil, a territorial fig specialist of SE Asia."
• "There is an African bird called the hornbill, whose habits are in some respects a model."
• "The hornbill is a double-beaked bird that makes for a unique sight."