a good deal a good deal /ə ɡʊd diːl/

adverb

1. To a very great degree or extent  ( a good deal , lots , a great deal , a lot , much , very much )
   to a very great degree or extent
    I feel a lot better
   I feel a lot better
    We enjoyed ourselves very much
   we enjoyed ourselves very much
    She was very much interested
   she was very much interested
    This would help a great deal
   this would help a great deal