1 : the things that happen to a person because of chance : the accidental way things happen without being planned
Our meeting happened by (pure) luck. [=chance]
Her business has been doing poorly, but she's hoping that her luck will change. [=she's hoping that she will begin to have success]
We had good/bad luck fishing.
2 a : good fortune : good luck
He succeeded through hard work and a little luck.
We need a bit of luck.
If our luck holds [=if our luck continues to be good], we should be able to arrive on time.
b : success in doing or getting something
Have you had any luck [=success] (in) finding a new apartment?
“I've been looking for a new apartment.” “Any luck?” “No, not yet.”
I've had no luck in finding a new apartment.
He had no better luck than I did.