an automatic fire alarm, burglar alarm, etc.; spec. a ship's alarm which transmits a distress signal by radio when triggered.
| 单词 | θ191842 |
| 释义 | society > communication > indication > signalling > audible signalling > [noun] > alarm signal generally > distress signal (1) auto-alarm1899 an automatic fire alarm, burglar alarm, etc.; spec. a ship's alarm which transmits a distress signal by radio when triggered. |
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