1) The lower part of a wall or building, a foundation.
1392-3 In salar. iij cementariorum operant. super j Grundewall ibidem, Ripon
1497 et pro waystones et grounde walles et stones, vjd, York
1539 for iij days for feyng of the ground wall that was falyn down at his garth end, York. Used occasionally as a verb: 1419-20 in grundwallyng et emend. unius loftflore, Ripon and in an occupational term: 1424 Joh. Sourdenall, Grundewall, York
1477 erthe wallers ... ground wallers with erthe, York.