classification

classification
    n 1: the act of distributing things into classes or categories
         of the same type [syn: {categorization}, {categorisation},
         {classification}, {compartmentalization},
         {compartmentalisation}, {assortment}]
    2: a group of people or things arranged by class or category
       [syn: {classification}, {categorization}, {categorisation}]
    3: the basic cognitive process of arranging into classes or
       categories [syn: {classification}, {categorization},
       {categorisation}, {sorting}]
    4: restriction imposed by the government on documents or weapons
       that are available only to certain authorized people [ant:
       {declassification}]
    

Classification \Clas`si*fi*ca"tion\, n. [Cf. F. classification.]
   The act of forming into a class or classes; a distribution
   into groups, as classes, orders, families, etc., according to
   some common relations or affinities.
   [1913 Webster]

   {Artificial classification}. (Science) See under
      {Artifitial}.
      [1913 Webster]
    

38 Moby Thesaurus words for "classification":
      antonomasia, appraisal, assessment, binomial nomenclature,
      biosystematics, biosystematy, categorization, class, evaluation,
      factoring, family, gauging, genus, glossology, grouping,
      identification, kingdom, nomenclature, onomastics, onomatology,
      order, orismology, phylum, place-names, place-naming, polyonymy,
      sifting, sifting out, sorting, sorting out, species, systematics,
      taxonomy, terminology, toponymy, trinomialism, weighing,
      winnowing