certainty certainly • Certhia · · · Info · Definitions · Synonyms · Antonyms · Characters · · certainty · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the state of being certain. Example: "His certainty reassured the others." · · Noun Definition 1 (noun) something that is certain. Synonyms: sure thing, foregone conclusion. Example: "His victory is a certainty." · · Noun Definition 2 Synonyms · · · sure thing · · Synonym 1 foregone conclusion · · Synonym 2 Antonyms · · · doubt · · Antonym 0 uncertainty · · Antonym 1 incertitude · · Antonym 2 dubiety · · Antonym 3 doubtfulness · · Antonym 4 dubiousness · · Antonym 5 uncertainness · · Antonym 6 precariousness · · Antonym 7 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079