Meaning of the word "set in stone" in English

What does "set in stone" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

set in stone

US /sɛt ɪn stoʊn/
UK /sɛt ɪn stoʊn/
"set in stone" picture

Idiom

1.

fixed and unchangeable

Example:
The decision is not yet set in stone, so we can still make changes.
His plans for the future are set in stone.
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