Meaning of “luck” - Learner’s Dictionary

luck

noun [ U ] uk us /lʌk/
BY CHANCE

A2 good and bad things caused by chance and not by your own actions:

It was just luck that I asked for a job at the right time.
Then I met this gorgeous woman and I couldn't believe my luck.
He seems to have had a lot of bad luck in his life.
SUCCESS

B2 success:

Have you had any luck (= succeeded in) finding your bag?
He's been trying to find work but with no luck so far.
be in luck informal

to be able to have or do what you want:

"Do you have any tuna sandwiches?" "You're in luck - there's one left."
Good luck!

something you say to someone when you hope that they will be successful:

Good luck with your exam!
Bad/Hard luck!

used to show sympathy when someone is unsuccessful or unlucky:

"They've run out of tickets." "Oh, bad luck!"

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