# thin blue line

> English word · Noun

## Definitions
1. The police.
2. A flag or symbol representing the police, commonly associated with the blue lives matter movement.

## Etymology
By analogy with Thin Red Line. “Blue” refers to the color of the uniforms of many police departments.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/thin-blue-line