There may be endless discussions about how much luck affect our game, but in the end it all is just pointless blabbering without understanding what really is luck and how it works.
For me pure definition of luck is that you got what you truly want.. But that means wining or losing is only about luck and skill is needed only to make good or bad decisions and luck do all the rest.
I am hoping that someone may add something to my luck definition, or even provide a new one 
Luck or chance is an event which occurs beyond one's control, without regard to one's will, intention, or desired result.
Says Wikipedia. But anyways, it's hard to put an exact definition on it. I guess you're sort of correct if we limit our discussion to poker.
There is no such thing as luck, there are a chance of anything to happen (something bigger than others).
Luck is just a word used when the mathematical underdog wins..
Luck is the most fickle of all mistress's.
She is one that we love and hate in equal measure but one who we will always return to no matter how badly she treats us at times
