Webster's Revised Unabridged Dictionary · 1913

Fantastic

Fantastic , adjective

[French fantastique, from Greek {not transcribed} able to represent, from {not transcribed} to make visible. See Fancy.]

1.
Existing only in imagination; fanciful; imaginary; not real; chimerical.
2.
Having the nature of a phantom; unreal. — Shakespeare
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

Fantastic , noun

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 draw it out to be seen. — Fuller