# set in stone

idiom

Source: https://englishreference.com/idiom/set-in-stone
Updated: 2026-08-10

## Meaning

Permanent; certain; firm.

## Examples

- The schedule isn't set in stone yet.
- We can still change the date — nothing's set in stone.
- Though the treaty appeared set in stone, diplomats worked through the night to alter its most controversial clause before the morning vote.

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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.