Dictionary

A military rank between captain and lieutenant colonel.

Example: He used to be a major in the army.

The main area of study of a student working toward a degree at a college or university.

Example: Midway through his second year of college, he still hadn't chosen a major.

A student at a college or university concentrating on a given area of study.

Example: She is a math major.

A person of legal age.

The major premise.

To concentrate on a particular area of study as a student in a college or university

Example: I have decided to major in mathematics.

Of great significance or importance.

Greater in number, quantity, or extent

Example: the major part of the assembly

Of full legal age, having attained majority

Of a scale that follows the pattern: tone - tone - semitone - tone - tone - tone - semitone

Example: A major scale.