identity matrix identification tag • ideo-unit · · · Info · Definitions · Synonyms · Characters · · identity matrix · · Text Common · · Latin · · Scripts 15 · · Length Definitions · · · (noun) a scalar matrix in which all of the diagonal elements are unity. Synonyms: unit matrix. · · Noun Definition 1 Synonyms · · · identity · · Synonym 1 personal identity · · Synonym 2 individuality · · Synonym 3 identity element · · Synonym 4 identity operator · · Synonym 5 identicalness · · Synonym 6 indistinguishability · · Synonym 7 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 x latin small letter x U+0078 y latin small letter y U+0079