1. a loud electric horn or warning signal

Examples

• The klaxon sounded to warn workers of the emergency.
• Ships use klaxons to signal their approach in foggy weather.
• The factory klaxon blared at quitting time.
• Emergency vehicles are equipped with klaxons and sirens.
• The klaxon’s harsh sound could be heard across the entire shipyard.
• When the klaxon went off, everyone knew to evacuate immediately.