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Synonyms

all clear

American  

noun

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

all clear British  

noun

  1. a signal, usually a siren, indicating that some danger, such as an air raid, is over

  2. an indication that obstacles are no longer present; permission to proceed

    he 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

Etymology

Origin of all clear

First recorded in 1915–20

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s not at all clear Newsom would have much clout.

From Los Angeles Times • Apr. 1, 2026

But it isn’t at all clear whether they would endorse one in a national vote, he added.

From The Wall Street Journal • Mar. 11, 2026

Paphos airport in western Cyprus was also evacuated but later got the all clear and was operating as normal, an airport official said.

From Barron's • Mar. 2, 2026

But she added that she would like to see intermediate-term metrics improve before waving the all clear.

From MarketWatch • Nov. 18, 2025

After an hour or two they had lost all clear sense of direction, though they knew well enough that they had long ceased to go northward at all.

From "The Fellowship of the Ring" by J.R.R. Tolkien

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.