She had a chance to win the lottery.

A possibility or opportunity for something to happen.
It was a chance meeting.
The result was chance, not skill.
This is a chance encounter.
chance encounter
chance meeting
by chance
accidental
random
unforeseen
There is a good chance it will rain tomorrow.

a possibility of something happening
You have a chance to win.
This is your only chance.
Take a chance on this.
good chance
slim chance
take a chance
possibility
opportunity
likelihood