1. A signaling device that makes a buzzing sound
   "The buzzer sounded to indicate the end of the game"
    
2. A push button at an outer door that gives a ringing or buzzing signal when pushed
   "The visitor pressed the buzzer and waited patiently";
   - doorbell, bell

Derived forms: buzzers

Type of: button, push, push button, signaling device

Encyclopedia: Buzzer