noun🔗ShareA group, often named or numbered, to which items are assigned based on similarity or defined criteria."The library organized its books by category, such as fiction, non-fiction, and children's books. "grouptypeorganizationsystemstructurethingessentialChat with AIVocabulary GamePractice Reading
noun🔗ShareA collection of objects, together with a transitively closed collection of composable arrows between them, such that every object has an identity arrow, and such that arrow composition is associative."The library organizes books into different categories, like fiction, nonfiction, and children's literature. "mathlogicphilosophyscienceessentialChat with AIVocabulary GamePractice Reading
