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English definition of “major”

major

noun [C]     /ˈmeɪdʒər/
SUBJECT US the most important subject that a college or university student studies, or the student who is studying: What's your major? Diane's an English major.University and college educationSubjects and disciplines
OFFICER an officer of middle rank in the army or air forceRanks in the ArmyRanks in the Air Force
(Definition of major noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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