Definition of grade verb from the Oxford Advanced American Dictionary

      

    grade

     verb
    verb
    NAmE//ɡreɪd//
     
    Verb Forms present simple I / you / we / they grade
     
    he / she / it grades
     
    past simple graded
     
    -ing form grading
     
     
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  1. 1[often passive] to arrange people or things in groups according to their ability, quality, size, etc. grade something/somebody (by/according to something) The containers are graded according to size. grade something/somebody from… to… Eggs are graded from small to extra large. Responses were graded from 1 (very satisfied) to 5 (not at all satisfied). grade something (as) something Ten beaches were graded as acceptable.
  2. 2 to give a grade to a student or to a piece of their written work grade somebody/something I spent all weekend grading papers. grade somebody/something + noun The best students are graded A. compare mark
See the Oxford Advanced Learner's Dictionary entry: grade