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DEW line

[doo, dyoo] /du, dyu/
a 3000-mile (4800–km)–long network of radar stations north of the Arctic Circle, maintained by the U.S. and Canada for providing advance warning of the approach of hostile planes, missiles, etc.
Origin of DEW line
1955-60; D(istant) E(arly) W(arning) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for DEW line

DEW line

noun acronym
distant early warning line, a network of radar stations situated mainly in Arctic regions to give early warning of aircraft or missile attack on North America
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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