"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."
2.NounUsed 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."
3.InterjectionExcellent! Used to indicate approval, or agreement.