claxon

Example:He honked his car horn to warn the approaching cyclist.

Definition:A musical instrument made of a long curved or straight tube that produces a loud sound when blown into

Example:The alarm sounded when the smoke detector detected smoke in the kitchen.

Definition:A signal indicating danger or warning

Example:The siren was used by emergency vehicles to warn the public of their presence.

Definition:A machine producing a high-pitched sound often used for warning purposes