Definition of classification noun from the Oxford Advanced American Dictionary

     

    classification

     noun
    noun
    NAmE//ˌklæsəfəˈkeɪʃn//
     
     
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  1. 1[uncountable] the act or process of putting people or things into a group or class (= of classifying them) a style of music that defies classification (= is like no other)
  2. 2[countable] a group, class, division, etc. into which someone or something is put
  3. 3[uncountable] (biology) the act of putting animals, plants, etc. into groups, classes, or divisions according to their characteristics The classification of bony fish is extremely complicated.
  4. 4[countable] (technology) a system of arranging books, tapes, magazines, etc. in a library into groups according to their subject
See the Oxford Advanced Learner's Dictionary entry: classification