Question

cast in concrete The law looks promising, but we’ll have to wait until it’s cast in concrete.

Accepted Answer

This idiom means “firmly or permanently established, not subject to change, unalterable“.

Phrase/Idiom	cast in concrete
Definition	This idiom means “firmly or permanently established, not subject to change, unalterable“.
Example	The law looks promising, but we’ll have to wait until it’s cast in concrete.

Cast Concrete Idiom Means Firmly Permanently Established Subject