atonalism atonal • atonalistic · · · Info · Definitions · Synonyms · Characters · · atonalism · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the absence of a key; alternative to the diatonic system. Synonyms: atonality. · · Noun Definition 1 Synonyms · · · atonality · · Synonym 1 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074