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

      

    junior

     noun
    noun
    BrE BrE//ˈdʒuːniə(r)//
     
    ; NAmE NAmE//ˈdʒuːniər//
     
    People in schools, School life
     
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    low level job
  1. 1  [countable] (especially British English) a person who has a job at a low level within an organization office juniors
  2. in sport
  3. 2  [countable] a young person below a particular age, rather than an adult She has coached many of our leading juniors. At 16, he’s still eligible to play for the juniors.
  4. in school/college
  5. 3[countable] (British English) a child who goes to junior school Sam is going to be a junior next year. See related entries: People in schools
  6. 4[countable] (North American English) a student in the year before the last year at high school or college compare sophomore See related entries: People in schools, School life
  7. son
  8. 5[singular] (North American English, informal) a person’s young son I leave junior with Mom when I'm at work.
  9. Word Origin Middle English (as an adjective following a family name): from Latin, comparative of juvenis ‘young’.Idioms
    be…years somebody’s junior, be somebody’s junior (by…)
     
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    to be younger than somebody, by the number of years mentioned She's four years his junior. She's his junior by four years.
See the Oxford Advanced American Dictionary entry: junior