Pass·ing, a.
 1. Relating to the act of passing or going; going by, beyond, through, or away; departing.
 2. Exceeding; surpassing, eminent. --Chaucer. “Her passing deformity.”
 Passing note Mus., a character including a passing tone.
 Passing tone Mus., a tone introduced between two other tones, on an unaccented portion of a measure, for the sake of smoother melody, but forming no essential part of the harmony.
 passing note
      n : a nonharmonic note inserted for transition between harmonic
          notes [syn: passing tone]