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all clear

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noun

the signal that an air raid or other danger is over.

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Origin of all clear

First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for all clear

all clear

noun

a signal, usually a siren, indicating that some danger, such as an air raid, is over
an indication that obstacles are no longer present; permission to proceedhe received the all clear on the plan
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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