Definition of junior

  1. junior Adjective Younger.
  2. junior Adjective Of or pertaining to a third academic year in a high school or university.
  3. junior Adjective Low in rank; having a subordinate role, job, or situation.
  4. junior Noun A younger person.
  5. junior Noun A third-year student at a high school or university.
  6. junior Noun A name suffix used after a son's name when his father has the same name. Abbreviation: Jr.
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