alarm

中文： 警报、闹钟、警报信号

1. A summons to arms, as on the approach of an enemy. (countable)
2. Any sound or information intended to give notice of approaching danger; a warning sound to arouse attention; a warning of danger. (countable)
3. A device intended to warn or give notice of approaching danger. (countable) · The fire alarm is located high on the wall to prevent tampering.
4. A sudden attack; a disturbance. (countable)
5. Sudden surprise with fear or terror caused by the apprehension of danger; a feeling of heightened alertness to risk. (countable) · His actions caused alarm among all the other people in the store, who hurried to leave.
6. A mechanical device for awaking people or rousing their attention. (countable) · The clock radio is a friendlier version of the cold alarm by the bedside.
7. An instance of an alarm ringing, beeping or clanging, to give a noise signal at a certain time. (countable) · Last night's alarm turned out to be nothing, but it was terrifying at the time.

复数 alarms