anything that happens suddenly or by chance without an apparent cause
a possibility due to a favorable combination of circumstances
an unknown and unpredictable phenomenon that causes an event to result one way rather than another
be the case by chance
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
take a risk in the hope of a favorable outcome
something that happens at a given place and time
a special set of circumstances
