American English

Definition of junior noun from the Oxford Advanced American Dictionary



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    in school/college
  1. 1[countable] a student in the year before the last year of high school or college compare freshman, senior, sophomore
  2. low level job
  3. 2[countable] a person who has a job at a low level within an organization office juniors
  4. son
  5. 3[singular] (informal) a person's young son I leave junior with Mom when I'm at work.
  6. Idioms
    be…years somebody's junior, be somebody's junior (by…)
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    to be younger than someone, by the number of years mentioned She's four years his junior. She's his junior by four years.
See the Oxford Advanced Learner's Dictionary entry: junior