Meaning of coping stone | Babel Free

Definitions

1. A capstone.
   figuratively, literally
2. One of the stones or slabs that form the outer edge of a railway station platform, next to the track.

Examples

“Other station works include platform extensions to 240 metres, track renewals (which had been completed on three of the four running lines at Kettering by early September) and work on the platform surfaces, such as realignment of coping stones.”

CEFR level