Noun categorisation has 3 senses

• categorisation(n = noun.group) categorization, classification - a group of people or things arranged by class or category; Array
is a kind of arrangement
has particulars: dichotomy, duality, trichotomy

• categorisation(n = noun.cognition) categorization, classification, sorting - the basic cognitive process of arranging into classes or categories; Array
has particulars: coordination, appraisal, assessment, ascription, attribution, ascription, attribution, cross-classification, cross-division, subsumption
is a kind of basic cognitive process

• categorisation(n = noun.act) assortment, categorization, classification, compartmentalisation, compartmentalization - the act of distributing things into classes or categories of the same type; Array
is a kind of grouping
has particulars: indexing, reclassification, relegation, stratification, taxonomy, typology