aeropause[er′ō pôz′, er′ə-]
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a region at the upper level of the earth's atmosphere, regarded as the boundary between the atmosphere and outer space
Origin: aero- plush pause
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The region of the atmosphere above which aircraft cannot fly.