To make clean; free from filth, impurity, infection, or, in general, from whatever is polluting, noxious, or offensive.To free from moral impurity or guilt.To remove; wash or purge away.In calico-printing, to render (the undyed parts) white and clean by removing the excess of mordant from them by immersion in a bath of cow-dung and warm water, or in some artificial substitute; to dung.In brewing, to remove the yeast from (the beer).To become clean.