# ringworld

> English word · Noun

## Definitions
1. An artificial megastructure in space, consisting of a rotating ring encircling a star and having an inhabitable inner surface with gravity produced through centripetal force.

## Etymology
From ring + world, introduced by Larry Niven in the novel Ringworld (1970).

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