noun pl. melodies -·dies

1. 1. pleasing sounds or arrangement of sounds in sequence
   2. musical quality, as in the arrangement of words
2. Music
   1. a sequence of single tones, usually in the same key or mode, to produce a rhythmic whole; often, a tune, air, or song
   2. the element of form having to do with the arrangement of single tones in sequence
   3. the leading part, or voice, in a harmonic composition; the air

Etymology: ME melodie < OFr < LL melodia < Gr melōidia < melos, song (see melic) + aeidein, to sing: see ode