functor
/ˈfʌŋktə/noun
functor is spelled F-U-N-C-T-O-R: 7 letters. It appears about once in every 7 million words in written English, the 79,518th most frequent word form (wordfreq, 2021 data). As a noun, functor means “A function word” (English Wiktionary, September 2026). The plural of functor is functors.
How many letters and syllables are in functor?
| Letters | 7: F-U-N-C-T-O-R |
|---|---|
| In writing | about once in every 7 million words; the 79,518th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is functor?
Functor appears about once in every 7 million words in written English, the 79,518th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce functor?
- UK /ˈfʌŋktə/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-functor.wav, Wikimedia Commons (author and licence on each file's page).
Forms of functor
- functors plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does functor mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A function word.
- 2
A function object.
- 3
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.
- 4
A structure allowing a function to apply within a generic type, in a way that is conceptually similar to a functor in category theory.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Functor in Spanish, French, German and Portuguese
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does functor come from?
From function, modeled after factor.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).