Added 9 October 2026 categorisation noun Categories: SocietyMind & IdeasRare Words noun ! Definition from Wiktionary (CC BY-SA). More about categorisation at Wordnik → Where our words come from → Alternative form of categorization. Related Words: categorizationclassificationcategorizeclassifyingsortsortingstreamliningrankinggradingcharacterizationratingqualification Back to today's word