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senior

adjective

  1. of the greater age; older: written Sr. after the name of a father whose son has been given exactly the same name
  2. of higher rank or standing, or longer in service
  3. ☆ of or for seniors in a high school or college
  4. of or for senior citizens: senior athletes, a senior center

noun

  1. a person older than another or others
  2. a person of greater rank, standing, or length of service
  3. ☆ a student in the last year of college or the twelfth grade in high school
  4. senior citizen

See senior in American Heritage Dictionary 4

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