blue-sky

blue-sky Definition

☆ blue·-sky (-skī′)

adjective

of no value; worthless

Etymology: see blue-sky law

blue sky Telecom Definition

See Rayleigh scattering.

blue-sky Usage Examples

Modifies a noun

thinking: Nobody here has heard anything on the subject of envelope-pushing or blue-sky thinking for several hours.
research: SD - Do you prefer enabling artists or blue-sky research?

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