Meaning of “break (sth) off” - Learner’s Dictionary

break (sth) off

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

to separate a part from a larger piece, or to become separate from something:

He broke off a piece of chocolate.

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