Definition of "luck"

luck

/lʌk/

noun
usually uncountable, plural lucks
1. Something that happens to someone by chance, a chance occurrence, especially a favourable one.
2. A superstitious feeling that brings fortune or success.
  Quotations
  Shepard: We better get moving.Dr. Warren: Good luck, Commander.Dr. Manuel: Luck won't save you.
  2008, BioWare, Mass Effect (Science Fiction), Redwood City: Electronic Arts, PC, scene: Eden Prime
3. Success.
4. (video games, computing) The results of a random number generator.
verb
third-person singular simple present lucks, present participle lucking, simple past and past participle lucked
1. (intransitive, informal) To find something through good fortune; used with into, on, onto or upon.
  Quotations
  I lucked upon a seat, settled in, nodded off and 20 minutes later heard my name being called by the admitting nurse.
  2004 December, The Crisis, volume 111, page 50
  But then I lucked on a backpackers' lodge lying half-hidden behind some trees right next to the road. It was a considerable relief to both my mind and my muscles.
  2010, Riaan Manser, Around Africa On My Bicycle