I do not relate luck to gambling because it is so much evident that the games and odds in gambling (but odds betting) are programmed in a way that gamblers will eventually lose. Gamble more and lose is the reality. Win and do not gamble for that time wise decision. Also with the little amount of money I am using to gamble, it is like that because there is nothing like luck to me in gambling. Most people will lose while 1 out of thousands of people would win which are the lucky ones. I am not saying there is no lock in gambling but understand what I mean.
In my definition of luck in gambling I usually say that luck is brings us close to winning by being at the right place of betting a particular game at a particular time since if such games repeat itself the results can be different entirely, we maximize every bit of whatever we think can be a possible outcome and hope that luck sees us through but yeah most times we are caught ( Lossing) and most times we win too, there are those who has been gambling for long without having the experience winning, it is because luck has not been on their side by not being at the right place at the right time.