Chiefly north. dial. [Cf. dial. swank of the same meaning; both may be derived (with guttural suffix) from the root swam-, and so ultimately related to swamp (with labial suffix).] A low-lying piece of ground liable to be flooded; a boggy depression, swamp. See also first quot. and cf. SWAMP sb. 1 b, quot. 1691.
1691. Ray, N. C. Words, 72. A Swang, a fresh piece of green Swarth lying in a bottom among arable or barren Land. A Dool. Ibid., 137. A Swang, locus paludosus, or part of a Pasture overflowd with water.
1811. Willan, W. Riding Words, in Archaeologia, XVII. 160. Swang, a part of a pasture covered with water.
1891. Atkinson, Moorland Par., 70. The swampy, undrained swang.