The Oxford Thesaurus An A-Z Dictionary of Synonyms - terrificadj.

1) See terrible, 4, 5, 6, above. 2) wonderful, marvellous, splendid, breathtaking, extraordinary, outstanding, magnificent, exceptional, unbelievable, incredible, mind-boggling, stupendous, superb, excellent, first-class, superior, Colloq great, ace, fantastic, fabulous, sensational, smashing, super: They really put on a terrific show.