# cone

> English word · Noun · IPA /ˈkəʊn/ · frequency rank #9,153

## Definitions
1. A surface of revolution formed by rotating a segment of a line around another line that intersects the first line.
2. A solid of revolution formed by rotating a triangle around one of its altitudes.
3. A space formed by taking the direct product of a given space with a closed interval and identifying all of one end to a point.
4. Anything in the general shape of a cone.
5. Anything in the general shape of a cone.
6. Anything in the general shape of a cone.
7. Anything in the general shape of a cone.
8. Anything in the general shape of a cone.
9. Anything in the general shape of a cone.
10. Anything in the general shape of a cone.
11. Anything in the general shape of a cone.
12. Any of the small cone-shaped structures in the retina.
13. The bowl piece on a bong.
14. The bowl piece on a bong.
15. An object V together with an arrow going from V to each object of a diagram such that for any arrow A in the diagram, the pair of arrows from V which subtend A also commute with it. (Then V can be said to be the cone’s vertex and the diagram which the cone subtends can be said to be its base.)
16. A set of formal languages with certain desirable closure properties, in particular those of the regular languages, the context-free languages and the recursively enumerable languages.

## Etymology
From Middle English cone (“corner, angle”) and conoun (“cone”), from Medieval Latin cōnus, cōnon (“cone, wedge, peak”), from Ancient Greek κῶνος (kônos, “cone, spinning top, pine cone”). Reinforced by Middle French cone, from the same Graeco-Latin source.

## Easily confused with
- **cop** (https://plainspell.com/en/vs/cone-vs-cop)
- **cow** (https://plainspell.com/en/vs/cone-vs-cow)
- **cos** (https://plainspell.com/en/vs/cone-vs-cos)
- **cox** (https://plainspell.com/en/vs/cone-vs-cox)
- **cue** (https://plainspell.com/en/vs/cone-vs-cue)
- **cor** (https://plainspell.com/en/vs/cone-vs-cor)
- **coo** (https://plainspell.com/en/vs/cone-vs-coo)
- **cot** (https://plainspell.com/en/vs/cone-vs-cot)
- **coz** (https://plainspell.com/en/vs/cone-vs-coz)
- **coy** (https://plainspell.com/en/vs/cone-vs-coy)
- **CTE** (https://plainspell.com/en/vs/cone-vs-cte)
- **Cov** (https://plainspell.com/en/vs/cone-vs-cov)
- **CSE** (https://plainspell.com/en/vs/cone-vs-cse)
- **cost** (https://plainspell.com/en/vs/cone-vs-cost)
- **cool** (https://plainspell.com/en/vs/cone-vs-cool)
- **copy** (https://plainspell.com/en/vs/cone-vs-copy)
- **core** (https://plainspell.com/en/vs/cone-vs-core)
- **cook** (https://plainspell.com/en/vs/cone-vs-cook)
- **cute** (https://plainspell.com/en/vs/cone-vs-cute)
- **cops** (https://plainspell.com/en/vs/cone-vs-cops)

## Common misspellings (4)
`ccone`, `cnoe`, `coen`, `conne`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/cone