functor
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functor
- /ˈfʌŋktə/ UK
Where it comes from
From function, modeled after factor.
noun functors
- A function word.
- A function object.
- A category homomorphism; a morphism from a source category to a target category which maps objects to objects and arrows to arrows (either covariantly or contravariantly), in such a way as to preserve morphism composition and identities. In the category of categories #92;mathbf#123;Cat#125; the objects are categories and the morphisms are functors.
- A structure allowing a function to apply within a generic type, in a way that is conceptually similar to a functor in category theory.
Translations
Talk about this word "functor." Wiktionary, via Micwyn, micwyn.com/word/functor. Accessed 6 Nov. 2026. functor. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/functor "functor." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/functor.
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BibTeX
@misc{functor_2026,
title = {functor},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/functor},
urldate = {2026-11-06}
}
