irrelevancy irrelevance • irrelevant · · · Info · Definitions · Synonyms · Characters · · irrelevancy · · Text Latin · · Script 11 · · Length Definitions · · · (noun) the lack of a relation of something to the matter at hand. Synonyms: irrelevance. · · Noun Definition 1 Synonyms · · · irrelevance · · Synonym 1 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 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 v latin small letter v U+0076 y latin small letter y U+0079