/əˈlɑ:m ||; əˈlɑrm/noun1 [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