▪ the quality of being reliably true: "there is a bewildering lack of certainty and clarity in the law"
▪ a fact that is definitely true or an event that is definitely going to take place: "an immediate transfer would be a certainty"Similarinevitabilitynecessityforegone conclusionpredictable resultmatter of courseracing certaintycertain winnerinformal:sure thingcertdead certsure-fire winnerOppositepossibilityimpossibility
▪ a person or thing that may be relied on:"he was expected to be a certainty for a gold medal"
Word OriginMiddle English: from Old French certainete, from certain (see certain).