Meaning of “break up” - Learner’s Dictionary

break up

phrasal verb with break uk us /breɪk/ verb (past tense broke, past participle broken)
PEOPLE

B1 If people break up, they stop having a relationship or stop working together:

He's just broken up with his girlfriend.
SCHOOL UK

B1 When schools or colleges break up, the classes end and the holidays begin.

(Definition of “break up phrasal verb, verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)