fænˈtæstɪk ˈmɑːvələs ˈmɑɹvələs ˈmɑɹvələs təˈɹɪfɪk tɹɪˈmɛndəs ˈwʌn.də.fl ˈwʌn.dɚ.fl̩ ˈwʌndɹəs extraordinarily good or great; used especially as intensifiers 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 of or relating to a phenomenon phenomenal science