TERRIFIC Meaning of TERRIFIC in English ■ adjective1》 of great size, amount, or intensity. ↘ informal excellent. 2》 archaic causing terror.Derivatives~ally adverb OriginC17: from L. ~us , from terrere 'frighten'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004