a commissioned military officer ranking next below a lieutenant colonel and next above a captain.
one of superior rank, ability, etc., in a specified class.
History was my major at college.
a subject or field of study chosen by a student to represent his or her principal interest and upon which a large share of his or her efforts are concentrated:History was my major at college.
a student engaged in such study.
a person of full legal age (opposed to minor).
a major interval, chord, scale, etc.
He coached in the majors as well as in the minors.
Sports.the major leagues:He coached in the majors as well as in the minors.
the companies or organizations that lead or control a particular field of activity:the oil majors.
—adj.
greater in size, extent, or importance: the major part of the town.
great, as in rank or importance: a major political issue; a major artist.
serious or risky: a major operation.
of or pertaining to the majority: the major opinion.
of full legal age.
a major third; a major sixth.
(of an interval) being between the tonic and the second, third, sixth, or seventh degrees of a major scale:a major third; a major sixth.
(of a chord) having a major third between the root and the note next above it.
pertaining to the subject in which a student takes the most courses: Her major field is English history.
(cap.) (of one of two male students in an English public school who have the same surname) being the elder or higher in standing: Hobbes Major is not of a scientific bent.
—v.i.
to follow a major course of study: He is majoring in physics.