set in stone


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Related to set in stone: smoother, touch base, revellers, stepping up to the plate

set in stone

firmly established and very difficult to change set in concrete The schedule isn't set in stone, but we'd like to stick to it pretty closely.
Usage notes: sometimes with other verbs, such as write, carve, or etch: Our business plan isn't carved in stone - we can still make adjustments if we need to.
See also: set, stone