noun
VERB + FIRE ALARM
▪ set off
▪
It was thought that the ~ had been set off as a prank.
▪ install
▪
Fire alarms have been installed in the building.
FIRE ALARM + VERB
▪ go ( esp. BrE ), go off , sound
▪
The ~ went off when I was making a coffee.
FIRE-ALARM + NOUN
▪ system