- 1 [countable] (abbreviation Maj.) an officer of fairly high rank in the army or the air force Major Smith He's a major in the U.S. army. see also drum major, sergeant major
- 2 [countable] the main subject or course of a student at college or university Her major is French. compare minor
- 3 [countable] a student studying a particular subject as the main part of their course She's a French major.
- 4 the majors [plural] (sport) the Major Leagues
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