- blue-sky ˈblue-sky adjective [only before a noun]blue-sky thinking is thinking of ideas or solutions that are completely new and different from anything that people have thought of before:
• Some blue-sky thinking was needed to try and solve the pensions’ crisis.
• Toyota's blue-sky approach has completely changed the way its cars are made.
* * *blue-sky UK US adjective● blue-sky thinking — Cf. blue-sky thinking
Financial and business terms. 2012.