1 [U] a sudden feeling of fear or worry 惊慌;不安:
She jumped up in alarm.她惊慌地跳了起来。
2 [sing] a warning of danger 警报:
A small boy saw the smoke and raised the alarm.一个小男孩见到冒烟马上呼救。
3 [C] a machine that warns you of danger, for example by ringing a loud bell 警报器:
The burglars set off the alarmwhen they broke the window.盗贼破窗而入的时候触响了警报器。The fire / burglar alarmwent off in the middle of the night.半夜里,火警警铃/防盗警铃响了。
4 [C] =ALARM CLOCK
a false alarm→FALSE
alarm²
/əˈlɑ:m ||; əˈlɑrm/verb
[T] to make sb/sth feel suddenly frightened or worried 使惊慌;惊动