The noun has 3 meanings:
Meaning #1:
a group of people or things arranged by class or category
Synonyms: classification, categorization
Meaning #2:
the basic cognitive process of arranging into classes or categories
Synonyms: classification, categorization, sorting
Meaning #3:
the act of distributing things into classes or categories of the same type
Synonyms: categorization, classification, compartmentalization, compartmentalisation, assortment
