Definition of big deal
: something of special importance <what's the big deal?> —sometimes used ironically as an interjection
Examples of big deal in a sentence
The party was a big deal.
The cost didn't seem like much to me, but I know it was a big deal for many people.
First Known Use of big deal
BIG DEAL Defined for English Language Learners
Definition of big deal for English Language Learners
: something that is very important
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