noun

a possibility of something happening.

there is a chance of winning the raffle

possibility,prospect,probability,odds,likelihood,likeliness,expectation,anticipation,conceivability,feasibility,plausibility,risk,threat,menace,hazard,danger,fear,peril,liability,hope,opportunity,promise

adjective

fortuitous; accidental.

a chance meeting

verb

do something by accident or without intending to.

he was very effusive if they chanced to meet

happen