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  1. clas·si·fi·ca·tion
    IPA[ˌklasəfəˈkāSH(ə)n]
  2. noun

    • 1. the action or process of classifying something according to shared qualities or characteristics:

      the classification of disease according to symptoms
      Synonym : categorization, categorizing, classifying, classing, grouping, grading, ranking, organization, sorting, codification, systematization, stratification, taxonomy
    • 2. the arrangement of animals and plants in taxonomic groups according to their observed similarities (including at least kingdom and phylum in animals, division in plants, and class, order, family, genus, and species):

      the classification of the platypus was one of the critical issues of the 1830s diagnostic features in reptilian classification
    • 3. a category into which something is put:

      new classifications for drivers of commercial vehicles
  3. Variation

    • n.: noun: classification, plural noun: classifications

    • noun

      the action or process of classifying something:

      the arrangement of animals and plants in taxonomic groups according to their observed similarities (including at least kingdom and phylum in animals, division in plants, and class, order, family, genus, and species):

    • noun

      a simple method of describing the shapes of galaxies, using subdivisions of each of four basic types (elliptical, spiral, barred spiral, and irregular). Hubble's suggestion that they form an evolutionary sequence is no longer accepted.
    • noun

      a scientific classification according to features which are held to be objectively significant, rather than being selected for convenience.
    • noun

      a system of classification of stars based on their spectral types, the chief classes (O, B, A, F, G, K, M) forming a series from hot bluish-white stars to cool dull red stars.
    • noun

      a system of classification of stars based on their spectral types, the chief classes (O, B, A, F, G, K, M) forming a series from very hot bluish-white stars to cool dull red stars.
    • noun

      a simple method of describing the shapes of galaxies, using subdivisions of each of four basic types (elliptical, spiral, barred spiral, and irregular). Hubble's suggestion that they form an evolutionary sequence is no longer accepted.
    • noun

      a scientific classification according to features which are held to be objectively significant, rather than being selected for convenience.
    • noun

      an internationally applied decimal system of library classification which uses a three-figure code from 000 to 999 to represent the major branches of knowledge, and allows finer classification to be made by the addition of further figures after a decimal point.
    • noun

      an internationally applied decimal system of library classification which uses a three-figure code from 000 to 999 to represent the major branches of knowledge, and allows finer classification to be made by the addition of further figures after a decimal point.
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