Definition of minor noun from the Oxford Advanced Learner's Dictionary

      

    minor

     noun
    noun
    BrE BrE//ˈmaɪnə(r)//
     
    ; NAmE NAmE//ˈmaɪnər//
     
    Youth, Exams and degrees, Study routes
     
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  1. 1(law) a person who is under the age at which you legally become an adult and are responsible for your actions It is an offence to serve alcohol to minors. He was jailed for having sex with a minor. Wordfinderadolescent, age, elderly, generation, infant, juvenile, middle-aged, minor, teenage, young See related entries: Youth
  2. 2(especially North American English) a subject that you study at university in addition to your major See related entries: Exams and degrees, Study routes
  3. Word Origin Middle English: from Latin, ‘smaller, less’; related to minuere ‘lessen’. The term originally denoted a Franciscan friar, suggested by the Latin name Fratres Minores (‘Lesser Brethren’), chosen by St Francis for the order.
See the Oxford Advanced American Dictionary entry: minor