probability

1 the quality or state of being likely to occur <the plot of the movie thriller was exciting and surprising but woefully lacking in probability> Synonyms liability, likelihood Related Words credibility, plausibility, plausibleness; feasibility, feasibleness, possibility, potentiality, reasonability, reasonableness, viability Near Antonyms doubtfulness, dubiousness; impracticability, impracticality; implausibility, incredibility, incredibleness Antonyms improbability, unlikelihood, unlikeliness

2 a measure of how often an event will occur instead of another <the probability of flipping a coin and getting heads 50 times in a row is not good> Synonyms chance, odds, percentage Related Words outlook, prospect; contingency, possibility, potential, potentiality; conditional probability