alarm ( alarms plural & 3rd person present) ( alarming present participle) ( alarmed past tense & past participle )
1 n-uncount Alarm is a feeling of fear or anxiety that something unpleasant or dangerous might happen.
oft with/in N, N over/about n
The news was greeted with alarm by MPs...
2 verb If something alarms you, it makes you afraid or anxious that something unpleasant or dangerous might happen.
We could not see what had alarmed him. V n
3 n-count An alarm is an automatic device that warns you of danger, for example by ringing a bell.
He heard the alarm go off.
4 n-count An alarm is the same as an alarm clock.
6 If you say that something sets alarm bells ringing, you mean that it makes people feel worried or concerned about something.
alarm bells phrase N inflects
7 If you raise the alarm or sound the alarm, you warn people of danger.
raise/sound the alarm phrase V inflects
His family raised the alarm when he had not come home by 9pm.
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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"