BUZZER

buzzer

(noun) a signaling device that makes a buzzing sound

doorbell, bell, buzzer

(noun) a push button at an outer door that gives a ringing or buzzing signal when pushed

Source: WordNet® 3.1

Etymology

Noun

buzzer (plural buzzers)

One who, or that which, buzzes; an insect that buzzes.

A device that makes a buzzing sound.

(US slang) A police badge.

(cricket, slang) A run scored from an overthrow.

(obsolete) A gossip.

Source: Wiktionary

Buzz"er, n.

Definition: One who, or that which, buzzes; a whisperer; a talebearer. And wants not buzzers to infect his ear With pestilent speeches of his father's death. Shak.

Source: Webster’s Unabridged Dictionary 1913 Edition