DEW line

[ doo, dyoo ]
/ du, dyu /

noun

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)

British Dictionary definitions for dew line

DEW line
/ (djuː) /

n acronym for

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