Categorization is the act of sorting and organizing things according to group, class, or, as you might expect, category. This noun is very similar in meaning to "assortment," "classification," and "compartmentalization."

When we discuss the differences between mammals and birds, or reptiles and amphibians, we are talking about the categorization of the animal kingdom. Another form of categorization is the way libraries shelve their books by subject, genre, and reading level. Rearranging all those books by color or size would be yet another kind of categorization, but not a very useful one for people wanting to check out lots of books about birds or reptiles.

Definitions of categorization

n the basic cognitive process of arranging into classes or categories

categorisation, classification, sorting
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being of coordinate importance, rank, or degree
appraisal, assessment
the classification of someone or something with respect to its worth
ascription, attribution
assigning to a cause or source
ascription, attribution
assigning some quality or character to a person or thing
cross-classification, cross-division
classification according to more than one attribute at the same time
incorporating something under a more general category
critical analysis, critical appraisal
an appraisal based on careful analytical evaluation
the attribution of animal forms or qualities to a god
the attribution of consciousness and personality to natural phenomena such as thunderstorms and earthquakes and to objects such as plants and stones
the attribution to a source or cause
externalisation, externalization
attributing to outside causes
evaluation, rating, valuation
an appraisal of the value of something
assay, check
an appraisal of the state of affairs
acid test
a rigorous or crucial appraisal
reappraisal, reassessment, revaluation, review
a new appraisal or evaluation
an appraisal that underestimates the value of something
Type of:
basic cognitive process
cognitive processes involved in obtaining and storing knowledge

n the act of distributing things into classes or categories of the same type

assortment, categorisation, classification, compartmentalisation, compartmentalization
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the act of classifying and providing an index in order to make items easier to retrieve
classifying something again (usually in a new category)
the act of assigning (someone or something) to a particular class or category
the act or process or arranging persons into classes or social strata
practice of classifying plants and animals according to their presumed natural relationships
classification according to general type
Type of:
the activity of putting things together in groups

n a group of people or things arranged by class or category

categorisation, classification
dichotomy, duality
being twofold; a classification into two opposed parts or subclasses
being threefold; a classification into three parts or subclasses
Type of:
an orderly grouping (of things or persons) considered as a unit; the result of arranging

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