English

bell noun definition in School life topic from the Oxford Advanced Learner's Dictionary

bell

 noun: School life topic
an electrical device which makes a ringing sound when a button on it is pushed; the sound that it makes, used as a signal or a warning Ring the bell to see if they're in. The bell's ringing! The bell went for the end of the lesson. An alarm bell went off. (figurative) Warning bells started ringing in her head as she sensed that something was wrong.