neighbor note
noun
variants:
or less commonly neighbor tone
or neighboring tone
or neighboring note
Definition of neighbor note
: a nonharmonic note that is approached stepwise from above or below and returns to the previous note
Within this motive and elsewhere in the movement, the semitone neighbor note will prove to be the most consequential motivic cell … — Stephen E. Hefling, ed., Nineteenth-Century Chamber Music, 1998
— called also (chiefly British) auxiliary note, auxiliary tone
— see counterpoint illustrationKeep scrolling for more