blue-sky

[bloo-skahy]

adjective

1. fanciful; impractical.

   blue-sky ideas.

2. (especially of securities) having dubious value; not financially sound.

   a blue-sky stock.

blue-sky

noun

1. (modifier) of or denoting theoretical research without regard to any future application of its result

   a blue-sky project

verb

1. to theorize (about something that may not lead to any practical application)

Word History and Origins

Origin of blue-sky¹

First recorded in 1890–95

Related Words

• absurd 
• bizarre 
• extravagant 
• fantastic 
• fantastical www.thesaurus.com
• fictional 
• imaginative 
• offbeat 
• preposterous 
• unreal 
• whimsical