CORNER-STONE, noun The stone which lies at the corner of two walls, and unites them; the principal stone, and especially the stone which forms the corner of the foundation of an edifice. Who laid the corner-stone thereof? Job 38:1. Christ himself being the chief corner-stone Ephesians 2:1.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI