[1] : The Collaborative International Dictionary of English v.0.48

impractical \imprac"tical\, a.
   not practical.
   1913 webster

[2] : WordNet (r) 2.0

impractical
     adj 1: 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" ant: practical
     2: not practical or realizable; speculative; "airy theories
        about socioeconomic improvement"; "visionary schemes for
        getting rich" syn: airy, visionary, laputan
see also:
practical airy visionary laputan 

[3] : Moby Thesaurus II by Grady Ward, 1.0

72 moby thesaurus words for "impractical":
   abstract, academic, airy, armchair, autistic, awkward, beyond one,
   bulky, clumsy, conjectural, contrary, crosswise, cumbersome,
   dereistic, hulking, hulky, hypothetic, ideal, idealistic,
   impracticable, in the clouds, inconvenient, ineffective,
   ineffectual, infeasible, inoperable, insuperable, insurmountable,
   moot, nonfunctional, nonrealistic, notional, otherworldly,
   perverse, poetic, ponderous, postulatory, quixotic, romancing,
   romantic, romanticized, speculative, starry, starry-eyed,
   storybook, theoretical, too much for, transcendental, transmundane,
   unachievable, unattainable, unavailing, uncompassable, undoable,
   uneffectible, unfeasible, unhandy, unmanageable, unnegotiable,
   unperformable, unpractical, unrealistic, unrealizable,
   unserviceable, unsurmountable, unusable, unwieldy, unworkable,
   useless, visionary, wild, wish-fulfilling

Impractical >> I Words
Impractical, definition of term: Impractical
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