'doorbell' definitions:

Definition of 'doorbell'

From: WordNet
noun
A push button at an outer door that gives a ringing or buzzing signal when pushed [syn: doorbell, bell, buzzer]

Definition of 'doorbell'

From: GCIDE
  • doorbell \doorbell\ n. a bell or other sounding device, actuated by a push button at an outer door; the push button activating the bell; alos, the ringing of such a bell; as, I was in the shower and didn't hear the doorbell.
  • Syn: bell, buzzer. [WordNet 1.5]