alarmlight
nounUK /əˈlɑːm laɪt/
US /əˈlɑːrm laɪt/
A light that turns on to warn people about danger.
When the fire started, the alarmlight flashed red above the door.
OTHER MEANINGS
2. A small light on a machine that shows something is wrong.
The alarmlight on the printer blinked until we added more paper.
3. A light that helps people find their way out during an emergency.
Follow the alarmlight down the stairs to the exit.
4. A colored lamp used to signal a warning at night.
The alarmlight on the tower spun around so ships could see it.