major

British statesman who was prime minister from 1990 until 1997 (born in 1943).

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”

Greater in scope or effect.

“a major contribution”

“a major improvement”

Of the field of academic study in which one concentrates or specializes.

“his major field was mathematics”

Of greater seriousness or danger.

“a major earthquake”

“a major hurricane”

Greater in number or size or amount.

“a major portion (a majority) of the population”

“a major portion of the winnings”

(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 full legal age.

Of greater importance or stature or rank.

“a major artist”

“a major role”

Of the elder of two boys with the same family name.

“Jones major”

Have as one's principal field of study.

“She is majoring in linguistics”