# five-o

> English word · Noun

## Definitions
1. The police.

## Etymology
From the police procedural television series Hawaii Five-O (first aired in 1968), so named because it is set in Hawaii, which is the 50th U.S. state.

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