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Noun: grader  grey-du(r)
  1. A vehicle with machinery for levelling the ground, used for making or improving roads
  2. [N. Amer] (used in combination with a number) a pupil at a specified school grade
    "5th graders are only ten years old"
  3. A judge who assigns grades to something

Derived forms: graders

Type of: critic

Encyclopedia: Grader