Causing terror; adapted to excite great fear or dread; terrible; as, a terrific form; a terrific sight.
source: Webster 1913
adjective satellite
very great or intense
A terrific noise. A terrific thunderstorm storm. Fought a terrific battle.
source: WordNet 3.0
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.