Cambridge Learner's Dictionary
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Definition
alarm1 Show phoneticsnoun
1 WARNING [C] a loud noise that warns you of danger
a fire alarm
to set off an alarm
2 CLOCK [C] (ALSO alarm clock) a clock that makes a noise to wake you
3 WORRY [U] a sudden feeling of fear or worry that something bad might happen
There's no need for alarm - it is completely safe.
4
to warn someone of a dangerous situation
Her parents raised the alarm when she failed to return home.
