the signal that an air raid or other danger is over.
Alright vs. All RightWhat’s the difference between alright and all right? Are all right and alright interchangeable? All right has a range of meanings including: “safe,” as in “Are you all right?” “reliable; good,” as in “That fellow is all right.” as an adverb, it means “satisfactorily,” as in “His work is coming along all right” “yes,” as in “All right, I’ll go with you.” The form alright is a one-word spelling …
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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. 2019
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