Source : Webster's Revised Unabridged Dictionary (1913)

Fanciful \Fan"ci*ful\, a.
   1. Full of fancy; guided by fancy, rather than by reason and
      experience; whimsical; as, a fanciful man forms visionary
      projects.

   2. Conceived in the fancy; not consistent with facts or
      reason; abounding in ideal qualities or figures; as, a
      fanciful scheme; a fanciful theory.

   3. Curiously shaped or constructed; as, she wore a fanciful
      headdress.

            Gather up all fancifullest shells.    --Keats.

   Syn: Imaginative; ideal; visionary; capricious; chimerical;
        whimsical; fantastical; wild.

   Usage: {Fanciful}, {Fantastical}, {Visionary}. We speak of
          that as fanciful which is irregular in taste and
          judgment; we speak of it as fantastical when it
          becomes grotesque and extravagant as well as
          irregular; we speak of it as visionary when it is
          wholly unfounded in the nature of things. Fanciful
          notions are the product of a heated fancy, without any
          tems are made up of oddly assorted fancies, aften of
          the most whimsical kind; visionary expectations are
          those which can never be realized in fact. --
          {Fan"ci*ful*ly}, adv. -{Fan"ci*ful*ness}, n.

Source : WordNet®

fanciful
     adj 1: indulging in or influenced by fancy; "a fanciful mind"; "all
            the notional vagaries of childhood" [syn: {notional}]
     2: not based on fact; dubious; "the falsehood about some
        fanciful secret treaties"- F.D.Roosevelt; "a small child's
        imaginary friends"; "her imagined fame"; "to create a
        notional world for oneself" [syn: {imaginary}, {imagined},
         {notional}]
     3: having a curiously intricate quality; "a fanciful pattern
        with intertwined vines and flowers"