ˈmeɪ.dʒə(ɹ) ˈmeɪ.dʒə(ɹ) ˈmeɪ.dʒə(ɹ) have as one's principal field of study She is majoring in linguistics greater in number or size or amount a major portion (a majority) of the population Ursa Major a major portion of the winnings greater in scope or effect a major contribution a major improvement a major break with tradition a major misunderstanding of full legal age (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 of the field of academic study in which one concentrates or specializes his major field was mathematics of greater importance or stature or rank a major artist a major role major highways of greater seriousness or danger a major earthquake a major hurricane a major illness of the elder of two boys with the same family name Jones major the principal field of study of a student at a university her major is linguistics a commissioned military officer in the United States Army or Air Force or Marines; below lieutenant colonel and above captain a university student who is studying a particular field as the principal subject she is a linguistics major