major (Noun) — British statesman who was prime minister from 1990 until 1997 (born in 1943).
major (Noun) — (military) a commissioned military officer in the United States Army or Air Force or Marines; below lieutenant colonel and above captain.
major (Noun) — A university student who is studying a particular field as the principal subject.
major (Noun) — The principal field of study of a student at a university.
major (Adjective) — Of greater importance, stature or rank. ex. "a major artist" ex. "a major role" ex. "major highways"
major (Adjective) — Greater in scope or effect. ex. "a major contribution" ex. "a major improvement" ex. "a major break with tradition" ex. "a major misunderstanding"
major (Adjective) — Greater in number, size or amount. ex. "Ursa Major" ex. "a major portion of the winnings" ex. "a major portion (a majority) of the population"
major (Adjective) — Of the field of academic study in which one concentrates or specializes.
major (Adjective) — (music) of a scale or mode. ex. "major scales" ex. "the key of D major"
major (Adjective) — Of greater seriousness or danger. ex. "a major earthquake" ex. "a major hurricane" ex. "a major illness"
major (Adjective) — (law) of full legal age.
major (Adjective) — Of the elder of two boys with the same family name.
major (Verb) — Have as one's principal field of study. ex. "She is majoring in linguistics"