1. A device on an automobile for making a warning noise
   - automobile horn, car horn, horn, hooter

Derived forms: motor horns

Type of: alarm, alarm system, warning device

Part of: auto, automobile, car, machine, motorcar

• top off
• top onion
• top out
• top quark
• top round
• top up
• top-down
• top-drawer
• top-flight
• top-grade
• top-heavy
• top-hole
• top-level
• top-post
• top-quality
• top-secret
• topaz
• topcoat
• topdress
• tope
• topee
• Topeka
• toper
• toper's nose
• topgallant