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
An emergency response to a fire by the fire department with manpower and equipment
smoke detector, device that detects smoke from a fire and emits a danger signal; danger signal warning of a fire
A fire alarm is a device that makes a noise, for example with a bell, to warn people when there is a fire. a piece of equipment that makes a loud noise to warn people of a fire in a building
an alarm that is tripped off by fire or smoke a shout or bell to warn that fire has broken out