The phrase "sounds one's horn" is a common expression used to indicate honking a car horn, typically in a warning, signaling or celebratory manner. Synonyms for this phrase include "honk the horn," "toot the horn," "blow the horn," "sound the horn," and "beep the horn." Each of these phrases essentially means the same thing and can be used interchangeably. The choice of phrase may depend on the context, tone, and formality of the situation. Regardless of the phrasing, the act of sounding one's horn is an important safety measure designed to alert others of a vehicle's presence or intentions while on the road.