■ adjective
1》 Music relating to or using notes not belonging to the diatonic scale of the key of a passage.
↘(of a scale) ascending or descending by semitones.
2》 relating to or produced by colour.
Derivatives
~ally adverb
~ism noun
Origin
C17: from Fr. chromatique or L. ~us , from Gk khrōmatikos , from khrōma , khrōmat- 'colour, ~ scale'.