that is that
variants: or
that's that
Definition of that is that
—used to say that a decision or situation cannot be changed I won't sell it for less than 50 dollars and that is that. I'm not going and that's that.
People Are Reading
Seen and Heard
What made you want to look up that is that? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!