Definitions:
a hole or pit dug in the ground; a trench or ditch, such as for irrigation or drainage; (in the fens of eastern england) specifically a drainage channel. also in figurative contexts. in later use english regional (east anglian and lincolnshire regional).

a quarry or mine; especially (in later use) a small quarry. in later use chiefly english regional.

a square device or bearing representing a square-cut turf, apparently used as an abatement.