FANTASTICALLY
fabulously, fantastically, incredibly
(adverb) exceedingly; extremely; “she plays fabulously well”; “behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains”
Source: WordNet® 3.1
Etymology
Adverb
fantastically (comparative more fantastically, superlative most fantastically)
In a fantastic manner.
To an extent only in fantasy' outrageously; ridiculously.
Source: Wiktionary
Fan*tas"tic*al*ly, adv.
Definition: In a fantastic manner.
the letter A, in scarlet, fantastically embroidered with gold thread,
upon her bosom. Hawthorne.
FANTASTIC
Fan*tas"tic, a. Etym: [F. fantastique, fr. Gr. Fancy.]
1. Existing only in imagination; fanciful; imaginary; not real;
chimerical.
2. Having the nature of a phantom; unreal. Shak.
3. Indulging the vagaries of imagination; whimsical; full of absurd
fancies; capricious; as, fantastic minds; a fantastic mistress.
4. Resembling fantasies in irregularity, caprice, or eccentricity;
irregular; oddly shaped; grotesque.
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.
Fan*tas"tic, n.
Definition: A person given to fantastic dress, manners, etc.; an eccentric
person; a fop. Milton.
Our fantastics, who, having a fine watch, take all ocasions to drow
it out to be seen. Fuller.
FANTASTICAL
Fan*tas"tic*al, a.
Definition: Fanciful; unreal; whimsical; capricious; fantastic.
Source: Webster’s Unabridged Dictionary 1913 Edition