Dictionary

clear–air turbulence

noun \ˈklir-ˈer-\

Definition of CLEAR-AIR TURBULENCE

:  sudden severe turbulence occurring in cloudless regions that causes violent jarring or buffeting of aircraft

First Known Use of CLEAR-AIR TURBULENCE

1955

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July 04, 2015
stringent Hear it
rigorous, strict, or severe
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