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Definition
alarm1   Show phonetics
noun
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 raise the alarm
to warn someone of a dangerous situation
Her parents raised the alarm when she failed to return home.
See also: burglar alarm, false alarm

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