Definition of good luck
1 —used to say that one hopes someone will succeedWe're sorry that you're leaving. Good luck in your new job.
2 informal —used to say that one thinks what someone is trying to do is difficult or impossible"I'm planning to ask for a raise." "Oh, really? Well, good luck (to you)."
Love words? Need even more definitions?Merriam-Webster unabridged
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