As far as; up to the place or degree that; especially, up to the time that

Or boulder clay; Deposit of clay, mud, gravel, and boulders left by a glacier. It is unsorted, with all sizes of fragments mixed up together, and shows no stratification; that is, it does not form clear layers or beds.
Unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together; SYN. boulder clay.

1. Chiefly Scottish; to
2. Or 'til also til; until

To work the soil.