unit matrix unit lock • unit of ammunition · · · Info · Definitions · Synonyms · Characters · · unit matrix · · Text Common · · Latin · · Scripts 11 · · Length 4 · · Syllables Definitions · · · (noun) a scalar matrix in which all of the diagonal elements are unity. Synonyms: identity matrix, unit matrix. · · Noun Definition 1 Synonyms · · · identity matrix · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 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 u latin small letter u U+0075 x latin small letter x U+0078