Meaning of “get by” - Learner’s Dictionary

get by

phrasal verb with get us uk /ɡet/ verb present participle getting, past tense got, past participle got, US gotten

to be able to live or deal with a situation with difficulty, usually by having just enough of something you need, such as money:

I don't know how he gets by on so little money.

(Definition of “get by” from the Cambridge Learner’s Dictionary © Cambridge University Press)