Fantastic adj. Pronunciation: fan-’tas-tik Definition: great, wonderful Synonyms: best, best ever, camp, cat’s meow, comical, curious, delicious, eccentric, excellent, extraordinary, far out, freakish, first-class, first-rate, grody, grotesque, kooky, ludicrous, marvelous, odd, oddball, off-beat, off-the-wall, outlandish, peculiar, primo, queer, ridiculous, sensational, singular, superb, unreal, unusual, way out, weird