impractical in WordNet English dictionary

1. not practical or realizable; speculative
   "airy theories about socioeconomic improvement"; "visionary schemes for getting rich"
   airy  impractical  visionary  Laputan  windy 
   
2. not practical; not workable or not given to practical matters
   "refloating the ship proved impractical because of the expense"; "he is intelligent but too impractical for commercial work"; "an impractical solution"
   impractical