# Kerberos

> English word · Proper noun · IPA /ˈkɜːbəɹəs/ · frequency rank #82,449

## Definitions
1. Alternative spelling of Cerberus.
2. An authentication protocol using a central ticket server.
3. The 4th moon of Pluto, discovered in 2011.

## Etymology
Ancient Greek Κέρβερος (Kérberos).

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