1.Definition: (of a scale or mode) having half steps between the third and fourth degrees and the seventh and eighth degrees
"Major scales", "The key of D major"
2.Definition: greater in number or size or amount
"A major portion (a majority) of the population", "Ursa Major", "A major portion of the winnings"
3.Definition: greater in scope or effect
"A major contribution", "A major improvement", "A major break with tradition", "A major misunderstanding"
4.Definition: of full legal age
5.Definition: of greater importance or stature or rank
"A major artist", "A major role", "Major highways"
6.Definition: of greater seriousness or danger
"A major earthquake", "A major hurricane", "A major illness"
7.Definition: of the elder of two boys with the same family name
8.Definition: of the field of academic study in which one concentrates or specializes
"His major field was mathematics"