1601. Holland, Pliny, II. lxxxvi. Chawmes [ed. 1634 chawnes] and gaping gulfes.
1825. Britton, Beauties of Wilts. Gloss. (E. D. S.), Chawm, a chasm, a crack in the ground.
1882. W. Worcestersh. Wds. (E. D. S.), Chaum, a crack in a floor or wall.
1884. Upton-on-Severn Wds. (E. D. S.), Chawm, a crevice, an earth-crack.