- Existing in or constructed from fantasy; of or relating to fantasy; fanciful.
- Synonym: fabulous
- He told fantastic stories of dragons and goblins.
- His fantastic post-school had all failed.
- She had a fantastic view of her own importance that no one else shared.
- Not believable; maybe only possible in fantasy.
- The events were so fantastic that all the audience went silent.
- She entered the lab and admired the fantastic machines around her.
- Wonderful; marvelous; excellent; really 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!"