Read the dictionary definition of luck. All definitions for this word.
1. an unknown and unpredictable phenomenon that causes an event to result one way rather than another
1. bad luck caused his downfall
2. we ran into each other by pure chance
2. an unknown and unpredictable phenomenon that leads to a favorable outcome
1. it was my good luck to be there
2. they say luck is a lady
3. it was as if fortune guided his hand
3. your overall circumstances or condition in life (including everything that happens to you)
1. whatever my fortune may be
2. deserved a better fate
3. has a happy lot
4. the luck of the Irish
5. a victim of circumstances
6. success that was her portion