1.
If you describe something or someone as terrific, you are very pleased with them or very impressed by them. (INFORMAL)
What a terrific idea!...
Everybody there was having a terrific time...
= great
ADJ
2.
Terrific means very great in amount, degree, or intensity.
All of a sudden there was a terrific bang and a flash of smoke.
= tremendous
ADJ: ADJ n [emphasis]
• terrifically
...the only child of terrifically repressed parents.
ADV: usu ADV adj/-ed