# all clear

> English word · Noun

## Definitions
1. a signal that danger, such as an air raid, is over; usually a siren at a single pitch
2. permission to proceed after obstacles have been removed

## Etymology
all + clear

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