[noncount], 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.