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 3. 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.