# that's that

idiom

Source: https://englishreference.com/idiom/thats-that
Updated: 2026-08-10

## Meaning

There is nothing more to say or to do concerning the matter and is not up for discussion or debate.

## Examples

- I am not changing my mind, so that's that.
- The manager decided to cancel the project immediately, and he made it clear that's that.
- After delivering his final verdict on the matter, he turned away from the table to signal that's that.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.