a hard permanent outgrowth, often curved and pointed, found in pairs on the heads of cattle, sheep, goats, giraffes, etc., a device for making a loud noise, especially one on a vehicle, one of the sections of a brass or woodwind instrument that produces sound by the vibration of the lips against a cup- or funnel-shaped mouthpiece

to blow one's own horn, to lock horns, to take the bull by the horns

Formal and Informal Expressions of horn

In different contexts, you can replace 'horn' with suitable alternatives. In a more formal setting, 'antler' is apt. In informal speech or writing, 'tusk' is a commonplace synonym.

horn: Explore its Definition & Usage

horn Definition

1a hard permanent outgrowth, often curved and pointed, found in pairs on the heads of cattle, sheep, goats, giraffes, etc.
2a device for making a loud noise, especially one on a vehicle
3one of the sections of a brass or woodwind instrument that produces sound by the vibration of the lips against a cup- or funnel-shaped mouthpiece

Using horn: Examples

Take a moment to familiarize yourself with how "horn" can be used in various situations through the following examples!

Example
The rhinoceros has two horns on its snout.
Example
The car's horn blared loudly as it approached the intersection.
Example
He played a beautiful melody on his French horn.

horn Synonyms and Antonyms

Synonyms for horn

Phrases with horn

to blow one's own horn
to boast about one's own achievements or abilities
Example
I don't like to blow my own horn, but I did get the highest score in the class.
to lock horns
to become involved in a dispute or argument
Example
The two politicians locked horns over the issue of healthcare reform.
to take the bull by the horns
to confront a difficult situation with courage and determination
Example
She decided to take the bull by the horns and ask her boss for a raise.

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Summary: horn in Brief

The term 'horn' [hɔːn] refers to a hard permanent outgrowth found in pairs on the heads of animals like cattle, sheep, goats, and giraffes. It also denotes a device for making a loud noise, especially on a vehicle, and one of the sections of a brass or woodwind instrument. Phrases like 'to blow one's own horn,' 'to lock horns,' and 'to take the bull by the horns' are idiomatic expressions that convey boasting, disputes, and courage, respectively.