Definition of the big day
- Tomorrow is the big day.
- So, when's the big day?
: of great strength
: of great force
: large or great in dimensions, bulk, or extent
: in a loud or declamatory manner
: to a large amount or extent
: on a large scale
: an individual or organization of outstanding importance or power
: a big player : a center or forward whose large size and strength are used to control play near the basket
: the time of light between one night and the next
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