1. A hollow metal object shaped like a cup which has a piece hanging inside it that hits the sides and makes a sound. English = bell.
2. A device that makes a ringing sound and is used to give a signal or to attract people's attention. English = bell.
3. An automatic device which warns you of danger, for example by ringing a bell. English = alarm.
4. 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.