Source : WordNet®

categorisation
     n 1: a group of people or things arranged by class or category
          [syn: {classification}, {categorization}]
     2: the basic cognitive process of arranging into classes or
        categories [syn: {classification}, {categorization}, {sorting}]
     3: the act of distributing things into classes or categories of
        the same type [syn: {categorization}, {classification}, {compartmentalization},
         {compartmentalisation}, {assortment}]