Longman Dictionary of Contemporary English
smoke alarm
noun
EXAMPLES FROM CORPUS
▪ He didn't have a smoke alarm.
▪ If possible read the manufacturer's information and instructions before you buy a smoke alarm.
▪ Smoking a cigarette will not normally set off a smoke alarm.
▪ The couple say that their smoke alarm, provided by the council, wasn't working.
▪ There are two basic types of smoke alarm.
Wiktionary
smoke alarm
n. A smoke detector
WordNet
smoke alarm
n. an alarm that is tripped off by fire or smoke [syn: fire alarm]
Usage examples of "smoke alarm".
He had the warrior's knack of quickly and easily falling asleep, but tonight he found himself staring at the ceiling where the tiny red light on the smoke alarm blinked on and off.
If the smoke alarm goes off while you're in the bath or shower, I doubt you'd take time to put on all that.
Larry was very glad that the smoke alarm's housing had taken the worst of her anger.
To human eyes it was a smoke alarm, but on the other planes its true form was revealed: an upside-down toad with unpleasantly bulbous eyes sitting on the ceiling.