great deal

idiomatic uncountable usually

(idiomatic) Large number, amount, or extent. / Used other than figuratively or idiomatically: see great, deal.

Japanese Meaning

非常に大きな量、数、または範囲を指す。 / 膨大な量や多数を表す。

She put a great deal of effort into preparing the presentation.

彼女はプレゼンテーションの準備に多大な努力を注いだ。

Sense（1）

(idiomatic) Large number, amount, or extent.

We have a great deal of territory to cover.

Sense（2）

Used other than figuratively or idiomatically: see great, deal.

I got a great deal on a motorcycle.

great deals

（ plural ）