good deal

English

good deal (plural good deals)

(idiomatic, usually singular, often with indefinite article) Large number, amount, or extent.
He made a good deal of trouble for us.

We have a good deal of territory to cover.

The audience is generally unaware of the good deal of work that goes into its creation.
- 1838, Edgar Allan Poe, How to Write a Blackwood Article:
  You may make a good deal of that little fact if properly worked.
- 1825-29, Mahadev Desai (translator), M.K. Gandhi, The Story of My Experiments with Truth, Part I, chapter xvi^[1]:
  A friend suggested that, if I really wanted to have the satisfaction of taking a difficult examination, I should pass the London Matriculation. It meant a good deal of labour and much addition to my stock of general knowledge, without any extra expense worth the name. I welcomed the suggestion. But the syllabus frightened me. Latin and a modern language were compulsory!
Used other than figuratively or idiomatically: see good,‎ deal.
I can offer you a good deal on that van.

There are plenty of good deals on flights.

(Should we delete⁽⁺⁾ this sense?) (informal) Used to affirm, indicate agreement, or consent.
You got everything packed? Good deal!