To Break Up

1. (transitive) To break or separate into pieces.
2. (intransitive) To break or separate into pieces; to disintegrate or come apart.
3. (transitive) To upset greatly; to cause great Emotional Disturbance or Unhappiness in.
4. (intransitive, idiomatic) To end a (usually romantic or sexual) Relationship.
5. (reciprocal, intransitive) To end a (usually romantic or sexual) Relationship with each other.
6. (intransitive, idiomatic) To dissolve; to part.
7. (intransitive, idiomatic) Of a school, to close for the holidays at the end of term.
8. (intransitive, telecommunications) Of a conversation, to cease to be understandable because of a bad connection; of a signal, to deteriorate.
9. (transitive, idiomatic) To stop a fight; to separate people who are fighting.
10. (intransitive, idiomatic, figuratively) To become Disorganized.
11. (transitive) To cut or take to pieces for scrap.
12. (transitive, intransitive, idiomatic, slang) To be or cause to be overcome with laughter.