adjective

1. 1. greater in size, amount, number, or extent
   2. greater in importance or rank
2. of full legal age
3. constituting the majority: said of a part, etc.
4. ☆ Educ. designating or of a field of study in which a student specializes and receives a degree
5. Music
   1. designating an imperfect interval greater than the corresponding minor by a semitone
   2. characterized by major intervals, scales, etc. in a major key
   3. designating a triad having a major third
   4. based on the scale pattern of the major mode

Etymology: ME maiour < L major, compar. of magnus, great: see magni-

intransitive verb

noun

1. Etymology: < majorthe

   a superior in some class or group

2. Etymology: Fr

   U.S. Mil. an officer ranking above a captain and below a lieutenant colonel
3. ☆ Educ.
   1. a major subject or field of study
   2. a student specializing in a specified subject a music major
4. Law a person who has reached full legal age
5. Music a major interval, key, etc.