smoke detector
US /ˈsmoʊk dɪˌtektər/
UK /ˈsmoʊk dɪˌtektər/
1.
a device that detects smoke, typically as an indicator of fire
:
•
The smoke detector went off, alerting us to the fire.
•
Every home should have at least one working smoke detector.
a device that detects smoke, typically as an indicator of fire