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English definition of “major”

major

adjective  /ˈmeɪ·dʒər/ us  

major adjective (IMPORTANT)

[not gradable] more important, bigger, or more serious than others of the same type: Fresh fruits are a major source of vitamin C. We awaited major new developments in the peace talks.

major adjective (MUSIC)

music based on a scale (= series of musical notes) in which there is a whole step (= sound difference) between each note except between the third and fourth notes and the seventh and eighth notes: a major scale a major chord

major

noun [C]  /ˈmeɪ·dʒər/ us  

major noun [C] (OFFICER)

a military officer of middle rank, above a captain

major noun [C] (SPECIAL SUBJECT)

the most important subject that a college or university student is studying, or the student studying that subject: an English major
(Definition of major from the Cambridge Academic Content Dictionary © Cambridge University Press)
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