# lightbar

> English word · Noun

## Definitions
1. A bar mounted on the roof of a vehicle, such as a police car, with rotating beacons or other lights to provide a visual warning.

## Etymology
From light + bar.

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