1. [ adjective ] ludicrously odd
Synonyms: grotesque antic fantastical

"Hamlet's assumed antic disposition" "fantastic Halloween costumes" "a grotesque reflection in the mirror"

Related terms: strange
2. [ adjective ] extraordinarily good; used especially as intensifiers
Synonyms: wonderful tremendous marvelous terrific wondrous marvellous rattling howling

"a fantastic trip to the Orient" "the film was fantastic!" "a howling success" "a marvelous collection of rare books" "had a rattling conversation about politics" "a tremendous achievement"

Related terms: extraordinary
3. [ adjective ] extravagantly fanciful and unrealistic; foolish

"a fantastic idea of his own importance"

Related terms: unrealistic
4. [ adjective ] existing in fancy only
Synonyms: fantastical

"fantastic figures with bulbous heads the circumference of a bushel"- Nathaniel Hawthorne

Related terms: unreal
5. [ adjective ] exceedingly or unbelievably great
Synonyms: phenomenal

"the bomb did fantastic damage" "Samson is supposed to have had fantastic strength" "phenomenal feats of memory"

Related terms: extraordinary
Similar spelling:   fantastical