concrete. plural. Steps, stairs. Also, stone for making steps. Obsolete.

a stone which closes the mouth of an oven; (also) a kind of stone used for building ovens.

The material, covering, or facing that forms a revetment; (occasionally as a count noun) an example of this.

attributive and in other combinations, as walling material, walling stone.

Stone used in or suitable for the construction of staircase landings.