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

fantastic \fantas"tic\, a. f. fantastique, fr. gr. ???????????
   able to represent, fr. ????????? to make visible. see
   fancy.
   1. existing only in imagination; fanciful; imaginary; not
      real; chimerical.
      1913 webster

   2. having the nature of a phantom; unreal. --shak.
      1913 webster

   3. indulging the vagaries of imagination; whimsical; full of
      absurd fancies; capricious; as, fantastic minds; a
      fantastic mistress.
      1913 webster

   4. resembling fantasies in irregularity, caprice, or
      eccentricity; irregular; oddly shaped; grotesque.
      1913 webster

            there at the foot of yonder nodding beech,
            that wreathes its old fantastic roots so high. --t.
                                                  gray.

   syn: fanciful; imaginative; ideal; visionary; capricious;
        chimerical; whimsical; queer. see fanciful.
        1913 webster
see also:
fancy fanciful 

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

fantastic \fantas"tic\, n.
   a person given to fantastic dress, manners, etc.; an
   eccentric person; a fop. --milton.
   1913 webster

         our fantastics, who, having a fine watch, take all
         ocasions to draw it out to be seen.      --fuller.
   1913 webster

[3] : WordNet (r) 2.0

fantastic
     adj 1: ludicrously odd; "hamlet's assumed antic disposition";
            "fantastic halloween costumes"; "a grotesque
            reflection in the mirror" syn: antic, fantastical,
             grotesque
     2: extraordinarily good; used especially as intensifiers; "a
        fantastic trip to the orient"; "the film was fantastic";
        "a howling success"; "a marvelous collection of rare
        books"; "had a rattling conversation about politics"; "a
        tremendous achievement" syn: howlinga, marvelous, marvellous,
         rattlinga, terrific, tremendous, wonderful, wondrous
     3: extravagantly fanciful and unrealistic; foolish; "a
        fantastic idea of his own importance"
     4: existing in fancy only; "fantastic figures with bulbous
        heads the circumference of a bushel"- nathaniel hawthorne
        syn: fantastical
     5: exceedingly or unbelievably great; "the bomb did fantastic
        damage"; "samson is supposed to have had fantastic
        strength"; "phenomenal feats of memory" syn: phenomenal
see also:
antic fantastical grotesque howlinga marvelous marvellous 
rattlinga terrific tremendous wonderful wondrous 
phenomenal 

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

194 moby thesaurus words for "fantastic":
   barmecidal, barmecide, gothic, absurd, adroit, airy, alien, antic,
   appalling, apparent, apparitional, arbitrary, astonishing,
   autistic, balmy, baroque, beguiling, bewildering, beyond belief,
   bizarre, brain-born, capricious, chimeric, chimerical, clever,
   cockamamie, concocted, conspicuous, cooked-up, cracking, cranky,
   crazy, crotchety, deceptive, delusional, delusionary, delusive,
   delusory, dereistic, dream-built, dreamlike, dreamy, eccentric,
   egregious, enigmatic, erratic, erroneous, exceptional, exotic,
   extraordinary, extravagant, fabricated, fabulous, fallacious,
   false, fancied, fanciful, fancy-born, fancy-built, fancy-woven,
   fantasied, fantasque, fascinating, fictional, fictitious, fictive,
   figmental, flaky, florid, foolish, forged, formidable, freakish,
   great, grotesque, harebrained, hatched, high-flown, humorsome,
   illusional, illusionary, illusive, illusory, imaginary, imagined,
   implausible, impossible, incomprehensible, inconceivable,
   incredible, ingenious, insane, invented, irrational, kinky,
   laughable, legendary, loony, ludicrous, made-up, maggoty,
   manufactured, marked, marvelous, massive, miraculous, misleading,
   monstrous, monumental, moody, mortal, motiveless, mythical,
   nonsensical, notable, noteworthy, noticeable, notional, odd,
   of mark, ostensible, outlandish, outrageous, outre, outstanding,
   overwhelming, passing strange, peculiar, petulant, phantasmagoric,
   phantasmal, phantom, phenomenal, poppycockish, preposterous,
   prodigious, put-up, puzzling, quaint, queer, quirky, rare,
   remarkable, ridiculous, rococo, seeming, self-deceptive,
   self-deluding, sensational, signal, silly, singular, specious,
   spectacular, spectral, splendid, strange, striking, stupendous,
   superior, supposititious, temperamental, terrific, towering,
   tremendous, trumped-up, unaccountable, unactual, unbelievable,
   uncommon, unearthly, unexpected, unfounded, unheard-of,
   unimaginable, unique, unlikely, unprecedented, unreal, unrealistic,
   unreasonable, unrestrained, unsubstantial, vagarious, vagrant,
   visionary, wacky, wanton, wayward, weird, whimsical, wild,
   wonderful, wondrous

Fantastic >> F Words
Fantastic, definition of term: Fantastic
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