validation validate • validatory · · · Info · Definitions · Synonyms · Characters · · validation · · Text Latin · · Script 10 · · Length Definitions · · · (noun) the act of validating; finding or testing the truth of something. Synonyms: proof, substantiation. · · Noun Definition 1 (noun) the cognitive process of establishing a valid proof. Synonyms: establishment. · · Noun Definition 2 Synonyms · · · proof · · Synonym 1 substantiation · · Synonym 2 establishment · · Synonym 3 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 v latin small letter v U+0076