Meaning of category by Wiktionary Dictionary
Explanation of category by Wordnet Dictionary
category
 IPA: /ˈkætəˌɡoɹi/
 A group, often named or numbered, to which items are assigned based on similarity or defined criteria .
 ( mathematics ) A 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 .
 One wellknown category has sets as objects and functions as arrows .
 Just as a monoid consists of an underlying set with a binary operation "on top of it" which is closed, associative and with an identity, a category consists of an underlying digraph with an arrow composition operation "on top of it" which is transitively closed, associative, and with an identity at each object. In fact, a category's composition operation, when restricted to a single one of its objects, turns that object's set of arrows ( which would all be loops ) into a monoid .
Etymology
From Middle French categorie, from Late Latin categoria ( “class of predicables” ), from Ancient Greek κατηγορία ( kategoria, “head of predicables” ) .
Pronunciation
Noun
category ( plural: categories )
Synonyms
Derived terms
Related terms
Explanation of category by Wordnet Dictionary
category

a general concept that marks divisions or coordinations in a conceptual scheme

a collection of things sharing a common attribute
Noun