chance

A possibility due to a favorable combination of circumstances.

“now is your chance”

The possibility of future success.

A measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible.

“if that phone call is for me, chances are it's my wife”

An unknown and unpredictable phenomenon that causes an event to result one way rather than another.

“we ran into each other by pure chance”

A risk involving danger.

“you take a chance when you let her drive”

Come upon, as if by accident; meet with.

“She chanced upon an interesting book in the bookstore the other day”

Take a risk in the hope of a favorable outcome.

Be the case by chance.

“I chanced to meet my old friend in the street”

Occurring or appearing or singled out by chance.

“a chance occurrence”