carved in stone
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Related to carved in stone: cast in stone
carve (something) in stone
To make something permanent and incapable of being changed, typically a plan or idea. We might get brunch next weekend, but we haven't carved anything in stone yet.
carved in stone
Permanently fixed or firmly established; incapable of being changed. Often used in the negative. The deal isn't yet carved in stone, but we're confident it will go ahead as hoped.
carved in stone
and engraved in stone; written in stoneFig. permanent or not subject to change. (Often in the negative.) Now, this isn't carved in stone yet, but this looks like the way it's going to be. Is this policy carved in stone, or can it still be modified?
in stone, cast/carved/written
Completely set, unchangeable. This phrase is often put in the negative—something is not cast in stone. It alludes to sculpture, where to cast means to pour and harden a material into a final form, and possibly also to the epitaphs engraved on gravestones. The first usage dates from the early 1500s. Most often it appears in such statements as, “Of course we can change it; this proposal is not cast in stone.”