clear-air turbulence: Meaning and Definition of

clear'-air' tur"bulence

Pronunciation: (klēr'âr'), [key]
  1. atmospheric turbulence, sometimes severe, occurring in air devoid of clouds or other visible indicators that turbulence might be present. Abbr.: CAT
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
clear clearance
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