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category

UK/ˈkæt.ɪ.ɡ(ə.)ɹi/US/ˈkæt.ɪˌɡoɹ.i/
nounB1Common in everyday speech and writing · #4,105 of 15,258mostly written

Other forms: categories

A category is a named group that similar things are sorted into. A separate category, fall into a category, category error.

A category error is treating something as the wrong kind of thing altogether — asking what colour a number is. Categories look natural and are usually made rather than found. The Greek behind it means an accusation, from public speaking.

Definitions of category

  1. 1nouncategoryA named group that similar things are sorted into.B1

    “The film won the prize in the best comedy category.”

category is a group.

Where it comes from

Greek kategoria means an accusation or a statement made against somebody, from kata plus agoreuein, to speak publicly. Aristotle took it for a class of predicates.

  1. Proto-Indo-European

    *h₂ger-

  2. French

    catégorie

  3. English, today

    category

From Middle English -, from French catégorie. Late Middle English -, borrowed from French catégorie, from Middle French categorie, from Latin catēgoria (“class of predicables”), from Ancient Greek κατηγορία (“head of predicables”). a doublet of categoria.

Etymology from Wiktionary, CC BY-SA

Practise this word

category in the wild

  • For example, a monoid may be viewed as a category with a single object, whose morphisms are the elements of the monoid.

    Category theory

  • Nevertheless, the labels for each category are assigned on the basis of universal criteria.

    Part of speech

  • In mathematics, a category (sometimes called an abstract category to distinguish it from a concrete category) is a collection of "objects" that are linked by "arrows".

    Category (mathematics)

  • A simple example is the category of sets, whose objects are sets and whose arrows are functions.

    Category (mathematics)

From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.

Related words

the catégorie family

category

category — used about once every 818 pages · #4,105 · point at the bar for the others

  • categorically