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bullhorn

American  
[bool-hawrn] / ˈbʊlˌhɔrn /
Or bull horn

noun

  1. a directional, high-powered, electrical loudspeaker or megaphone.


bullhorn British  
/ ˈbʊlˌhɔːn /

noun

  1. Also called (in Britain and certain other countries): loud-hailer.  a portable loudspeaker having a built-in amplifier and microphone

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of bullhorn

First recorded in 1950–55; bull 1 + horn

Compare meaning

How does bullhorn compare to similar and commonly confused words? Explore the most common comparisons:

Explanation

A bullhorn is a hand-held device that makes your voice sound much louder when you speak into it. You might address a crowd at a rally or protest by talking into a bullhorn. While in the US, most people know what a bullhorn is, in other places it's called a megaphone. Bullhorns amplify sound, sometimes simply using their cone-like shape, and in other cases using electricity. Anyone who needs to get the attention of a large or noisy group might use a bullhorn to be heard. The word may be based on the shape of a bull's horn, although experts aren't sure about its origin.

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

CHICAGO—When Maria Moctezuma learned that a project on busy Archer Avenue would replace on-street parking with bike lanes and reduce traffic from two lanes to one, she mobilized residents and grabbed a bullhorn to protest.

From The Wall Street Journal Jul. 30, 2026

Without a bullhorn or any sort of amplification, Bovino informed the crowd that they were being dispersed.

From Salon Apr. 15, 2026

In preparation for the march, he had purchased a $20 bullhorn from Amazon and called the San Francisco Police Department to ask about a permit.

From The Wall Street Journal Feb. 8, 2026

Then a familiar voice on a bullhorn cut through the clamor: Zohran Mamdani had taken the train in from New York to join the crowd.

From Slate Jun. 25, 2025

The lady climbs off and hands Ms. Ofrah the bullhorn.

From "The Hate U Give" by Angie Thomas

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