# luminal

> English word · Adjective · frequency rank #73,393

## Definitions
1. of or pertaining to the lumen
2. of or pertaining to the nature of light
3. light-speed; having the speed of light (usually in the void)

## Etymology
From Latin lumina (“lights”) + -al.

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