noun. A bell, chime, or buzzer outside a door that is rung to announce the presence of a visitor or caller.

noun. A bell at a door, or connected with a handle or knob exposed outside a door, for the purpose of giving notice when one desires admittance.

noun. 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.

noun. A device on or adjacent to an outer door for announcing one's presence. It can be mechanical, directly sounding a bell, or a button that electrically sounds a chime or buzzer inside the building.

noun. A button that actives an electric doorbell.

verb. To ring many doorbells in an effort to contact people and thereby spread information or solicit.

verb. To ring many doorbells of (target people or an area) in an effort to contact people and thereby spread information or solicit.

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

"And since we're on the second floor and our doorbell is broken, he announced his arrival by hurling a snowball at the window."