All Clear Definition

ôlklir
noun
A signal, usually by siren, that an air raid is over or a danger has passed.
American Heritage
A siren blast or other signal that an air raid or practice alert is over.
Webster's New World

A sign or signal indicating that a hindrance or danger is clear.

Wiktionary

A signal that danger, such as an air raid, is over; usually a siren at a single pitch.

Wiktionary
Wiktionary

Other Word Forms of All Clear

Noun

Singular:
all clear
Plural:
all clears

Origin of All Clear

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all clear