Definition of "fantastic" in English

adjective

1. Wonderful; marvelous; excellent; extraordinarily good or great (used especially as an intensifier).

   • "I had a simply fantastic vacation, and I can't wait to tell you all about it!"

2. Existing in or constructed from fantasy; of or relating to fantasy; fanciful.

   • He told fantastic stories of dragons and goblins.
   • His fantastic post-college plans had all collapsed within a year of graduation.
   • She had a fantastic view of her own importance that none of her colleagues shared.

3. (archaic) Not believable; implausible; seemingly only possible in fantasy.

4. (archaic) Resembling fantasies in irregularity, caprice, or eccentricity; irregular; grotesque.

noun

1. (archaic) A fanciful or whimsical person.