certitude certis • certosina · · · Info · Definitions · Synonyms · Characters · · certitude · · Text Latin · · Script 9 · · Length Definitions · · · (noun) total certainty or greater certainty than circumstances warrant. Synonyms: cocksureness, overconfidence. · · Noun Definition 1 Synonyms · · · cocksureness · · Synonym 1 overconfidence · · Synonym 2 Characters · · c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075