Dreadful; causing terror, alarm and fear; awesome
The witch gave him a terrible curse.
Formidable, powerful.
Intense; extreme in degree or extent.
He paid a terrible price for his life of drinking.
Unpleasant; disagreeable.
The food was terrible, but it was free.
Very bad; lousy.
Whatever he thinks, he is a terrible driver.
In a terrible way; to a terrible extent; terribly; awfully.