Definitions for a good deal
a lot, lots, a good deal, a great deal, much, very much(adverb)
to a very great degree or extent
"I feel a lot better"; "we enjoyed ourselves very much"; "she was very much interested"; "this would help a great deal"
a good deal(Noun)
A large amount; a lot.
a good deal(Adverb)
Very much; to a great extent; a lot; lots.