break up

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb intransitive To break or separate into pieces; to disintegrate or come apart.
• verb intransitive, idiomatic To end a relationship.
• verb intransitive, idiomatic To dissolve; to part.
• verb intransitive, idiomatic Of a school, to close for the holidays at the end of term.
• verb intransitive, idiomatic Of a telephone conversation, to cease to be understandable because of a bad connection.
• verb transitive To break or separate into pieces.
• verb transitive, idiomatic To stop a fight; to separate people who are fighting.