(figuratively, usually in the plural) A sudden awareness of danger. / Used other than figuratively or idiomatically: see alarm, bell.

(historical) A bell rung to signal danger or emergency. / A bell which is rung to indicate a pre-arranged time, especially to mark a desired moment for waking up, performing a specific action etc.

plural of alarm clock

plural of burglar alarm

(firefighting) The highest priority category of a multiple-alarm fire. / Having a high intensity or extreme heat.

(psychology) Desensitization to alarm signals, caused by lengthy or frequent exposure, and resultant slowed or absent responses to new alarms.

A state of emergency.

A clock with an alarm that can be set to sound at a determined time.

A warning device that is activated by trespassers, intended to deter burglars. / The loud warning signal produced by a burglar alarm.

An electromechanical or electronic bell, klaxon, chime, horn, speaker, strobe light or other device which warns people in a building of a possible fire or other condition requiring evacuation.