Luck or fortuity is a belief in good or bad fortune in life caused by accident or chance, and attributed by some to reasons of faith or superstition, which happens beyond a person's control.
Luck refers to that which happens to a person beyond that person's control.
Luck as a self-fulfilling prophecy, In personality psychology, people reliably differ from each other depending on four key aspects: beliefs in luck, rejection of luck, being lucky, and being unlucky. This is clearly likely to be self-reinforcing one way or the other depending on the persons outlook.
It cannot be shown that luck actually exists, hence luck is nothing more than a word used by one in an attempt to explain events of which one is informed or which one witnesses and are unable to understand those events.
Here is my example of luck: I am dealt K8 off in BB and several players call, just as I go to click on the "check" button, the last player goes "all-in" and just as I am clicking on the "check" button it changes under my pointer and I click the "call" that puts me all-in. There are three other players that call the "all-in" and all have better starting hands but my K8 wins. I think that is a good example of luck. Now turn it around and K8 lost would you call that bad luck, maybe stupidity for not being patient but that has happened and the above is a real example. So even if it is a stupid mistake win or loose it is an example of luck, if you think luck is a good word.
Games
A Game may depend on luck rather than skill or effort. For example, Chess does not involve any random factors such as throwing dice, while Dominoes has the "luck of the draw" when selecting tiles.
Lotteries
A National Lottery "play here!" sign outside a newsagents on the Euston Road, London.
Many countries have a nationallottery. Individual views of the chance of winning, and what it might mean to win, are largely expressed by statements about luck. For example, the winner was "just lucky" meaning they contributed no skill or effort.
Means of resolving issues
"Leaving it to chance" is a way of resolving issues. For example, flipping a coin at the start of a sporting event may determine who goes first.