major scale definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Music any of the diatonic scales having the eight tones succeeding by whole tones but with a semitone between the third and fourth and seventh and eighth tones: there are twelve major scales, one in each key
major scale definition by American Heritage Dictionary
A diatonic scale having half steps between the third and fourth and the seventh and eighth degrees and whole steps between the other adjacent degrees.