blue-sky definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
of no value; worthless
Origin: see blue-sky law
blue-sky definition by American Heritage Dictionary
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.
- Unrealistic and impractical: “[The author] shows what is testable physics, what is philosphy's domain, and what is blue-sky nonsense” (Ann Finkbeiner).
- Having a cloudless sky; clear: a blue-sky day.
To hold or express unrealistic or impractical views, especially in estimating something. Often used with it.
blue-sky - Computer Definition
See Rayleigh scattering.