smoke detector

Noun

A device that sounds an alarm when it detects smoke or other evidence of fire.

Japanese Meaning

煙や火事の初期兆候を感知すると警報を発する装置。

The smoke detector in the hallway went off at three in the morning, waking everyone.

廊下の煙感知器が午前3時に鳴り、皆を起こしました。

Sense（1）

A device that sounds an alarm when it detects smoke or other evidence of fire.

smoke detectors

（ plural ）