What does bullhorn mean?
A bullhorn is a portable, battery-powered loudspeaker shaped like a flared cone, designed to project a person's voice across large distances or over noisy crowds. Held in one hand and spoken into directly, it combines a microphone, amplifier, and horn in a single unit, making it far louder than an unamplified megaphone. The name is purely descriptive: 'bull' here refers to the device's rounded, swollen shape rather than to any animal. Bullhorns are strongly associated with public life — police directing crowds, protesters leading chants, coaches running drills on sports fields, and lifeguards issuing warnings all rely on them. In British English the same device is usually called a loudhailer. The word evokes immediacy and urgency: whoever holds a bullhorn intends to be heard above the noise of a crowd, giving the object a natural association with leadership, authority, and public address.
nounA portable, cone-shaped megaphone with a built-in electronic amplifier and battery power, used to make the voice carry over long distances or through crowds.
- A handheld battery-powered loudspeaker with a flared conical horn, used to amplify the voice at protests, sporting events, emergencies, and other outdoor gatherings.
"The police officer raised her bullhorn and instructed the crowd to step back from the barricade."
"Standing on the steps of the courthouse, the union leader rallied the workers through his battered bullhorn."
"The lifeguard used a bullhorn to warn swimmers that they had strayed beyond the safety flags."
Standard regular plural.
"The stadium security team carried several bullhorns for crowd announcements."
The word 'bullhorn' has nothing to do with bulls — it simply borrows 'bull' in its old sense of any rounded, swollen shape, which is why the device is also called an electric megaphone.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bullhorn
Bullhorn is a compound of 'bull' and 'horn', coined in American English in the twentieth century. Here 'bull' does not refer to the animal but preserves an older sense of the word meaning something rounded or swollen — as seen in 'bullfrog' — so the name describes the instrument's bulging, horn-like shape. It denotes the electrically amplified successor to the plain acoustic megaphone and is closely related to the British term 'loudhailer'.
How bullhorn is actually used
The term is standard American English; British English more often uses 'loudhailer' for the same device. The word carries no strong register — it appears equally in news reporting, fiction, and everyday speech — but it frequently connotes public protest, crowd control, or authority addressing a mass of people.
Easily confused with bullhorn
A megaphone is typically a simple non-amplified acoustic horn held to the mouth, while a bullhorn is an electrically amplified device powered by batteries.