adj. 25B6; adjective
an impractical suggestion : UNREALISTIC, unworkable, unfeasible, non-viable, impracticable; ill-thought-out, impossible, absurd, wild; informal cock-eyed, crackpot, crazy.
impractical white ankle boots : UNSUITABLE, not sensible, inappropriate, unserviceable.
an impractical scholar : IDEALISTIC, unrealistic, romantic, dreamy, fanciful, quixotic; informal airy-fairy.
practical, sensible.