1. Foul matter; anything that soils or defiles; dirt; nastiness.
2. Anything that sullies or defiles the moral character; corruption; pollution. To purify the soul from the dross and filth of sensual delights.
(Science: medicine) (Tillotson) filth disease, a disease supposed to be due to pollution of the soil or water.
Origin: oe. Filthe, fuloe, as. Flo, fr. Ful foul; akin to OHG. Fulida. See foul, and cf. File.