adj. (also fantastical)
1. colloq. excellent, extraordinary.
2 extravagantly fanciful; capricious, eccentric.
3 grotesque or quaint in design etc.
Derivatives:
fantasticality n. fantastically adv.
Etymology: ME f. OF fantastique f. med.L fantasticus f. LL phantasticus f. Gk phantastikos (as FANTAST)