is an adjective referring to the alignment of
planets,
or the alignment of the sun and the moon.
And, also any pair of opposites that work in union together.
Music is full of examples of opposites that work together
to make something more than
the sum of it's parts.
Music is:
Art and Science
Strict Rules and Breaking Every Rule
Scales
Chord Stuctures and Variations
Chord Progressions
Harmony
Beats per Measure
Melodies step to adjacent notes
Familiarity and Surprise
Melody and counter-melody
Sharps and Flats
Pianos are:
Pianofortes: Piano(soft) and Forte(loud)
Black Keys and White Keys / Ebony and Ivory
Left Hand and Right Hand, both playing notes