Keywords: alarm, alarm bell, alarm clock
As a Noun
1. An automatic device that warns you of danger, for example by ringing a bell. English = alarm, alarm bell.
2. A type of clock with a mechanism that can be set to ring, vibrate or flash a light at a certain time. Used for waking a person up. English = alarm clock
As a Verb or Adjective
1. Of an alarm, to make a loud noise by ringing (or by any other means) in order to warn people of some danger.