# that's done it

idiom

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

## Meaning

Used to announce a successful solution to a problem.

## Examples

- I fixed the broken lamp, so that's done it.
- After struggling with the jammed lock for ten minutes, I finally turned the key and said, that's done it.
- When the final piece of the complex machine clicked into place, he wiped his brow and whispered that's done it, finally satisfied with his work.

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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.