Meaning of "pay someone/something back" in Essential American English Dictionary

pay someone/something back

phrasal verb with pay us /peɪ/ verb present participle paying, past tense and past participle paid

B1 to pay someone the money that you owe him or her:

Has he paid you back the money he owes you?

(Definition of “pay someone/something back” from the Webster's Essential Mini Dictionary © Cambridge University Press)