Black's Law Dictionary (2nd edition)dictionaries

Sough

In Engllsh law. A drain or water-course. The channels or water-courses used for draining mines are so termed; and those mines which are near to any given sough, and lie within the same level, and are benefited by it, are technically said to lie within the title of that sough. 5 Mees. & W. 228; Brown

Source: Black’s Law Dictionary 2nd Ed (1910)