smoke detector

noun

1. an electronic fire alarm that is activated by the presence of smoke.

Word History and Origins

Origin of smoke detector¹

First recorded in 1925–30

Example Sentences

He said the smoke detector may not have sounded because the door of the bedroom was closed.

From BBC

First, change out your old smoke detector.

From Seattle Times

Charmon and Akeem Isom, parents of six, told KABC-TV Channel 7 news they were unaware their four-bedroom home had no smoke detector, and they had no warning when flames from their tree began spreading.

From Los Angeles Times

Boxes beside the words “smoke detector” are checked to indicate the devices are functional, but a state board official did not know where such equipment might be because the Los Angeles Fire Department does the inspections.

From Los Angeles Times

The battery-operated smoke detector you acquired from the fire department years ago can be replaced with monitored smoke and heat detectors that will protect your family as soon as a fire begins.

From Seattle Times