Definition

1. Noun:
   • A device that produces a loud sound by means of compressed air: An "air horn" is a pneumatic horn, typically used on large vehicles like trucks, trains, or ships, or as a portable device for signaling or safety.
   • The air intake of a carburetor: In automotive engineering, an "air horn" is the trumpet-shaped opening of a carburetor where air enters to be mixed with fuel.

Usage Examples

• Noun (Pneumatic Horn):

  • The ship sounded its deep air horn as it left the harbor.
  • Safety regulations require trucks to be equipped with an air horn.
  • The fans blasted their air horns when the team scored.

• Noun (Carburetor Part):

  • The mechanic cleaned the air horn to improve the engine's airflow.
  • A larger air horn can sometimes increase an engine's power.

Advanced Usage

• "to blast/to sound an air horn": to activate the horn to create a loud noise.
  • The referee blasted his air horn to start the race.

Variants and Related Words

• Horn (n): A general term for any device that makes a loud warning sound.
• Pneumatic horn (n): A technical synonym for the signaling device.
• Air intake (n): A general term for the part of an engine where air is drawn in, related to the carburetor meaning.

Synonyms

• For the signaling device: Signal horn, klaxon (a type of electric horn, but often used similarly), warning horn.
• For the carburetor part: Intake bell, carburetor throat.

Related Phrases

• Air horn blast (n): The loud sound produced by an air horn.
  • The sudden air horn blast startled everyone.

Notes on Meaning

This word has two distinct technical meanings. The context usually makes it clear which is intended: transportation/safety contexts refer to the loud horn, while automotive/mechanical contexts refer to the carburetor part.

Noun

1. air intake of a carburetor
2. a pneumatic horn