Definition of "horn" []

• One of the hard, usually permanent structures projecting from the head of certain mammals, such as cattle, sheep, goats, or antelopes, consisting of a bony core covered with a sheath of keratinous material. (noun)
• A hard protuberance, such as an antler or projection on the head of a giraffe or rhinoceros, that is similar to or suggestive of a horn. (noun)
• The hard smooth keratinous material forming the outer covering of the horns of cattle or related animals. (noun)
• A natural or synthetic substance resembling this material. (noun)
• A container, such as a powder horn, made from a horn. (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.

• "The photo-op on the pile of Dead at ground-zero was staged down to being told stand on that pile, who the fireman with the blow horn is and where he will be, and to take the blow horn from the fireman."
• "‘Unnecessary use of the horn is against the traffic regulations.’"
• "This horn is a conk shell, bored at one end, and its sound is heard at a great distance."