1. Also called harmonic minor scale. a scale having half steps between the second and third, fifth and sixth, and seventh and eighth degrees, with whole steps for the other intervals.
2. Also called melodic minor scale. a scale having the third degree lowered a half step when ascending, and the seventh, sixth, and third degrees lowered a half step when descending.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.