Source : Webster's Revised Unabridged Dictionary (1913)

Filth \Filth\, n. [OE. filthe, ful[eth]e, AS. f?l[eth], fr.
   f[=u]l foul; akin to OHG. f[=u]lida. See {Foul}, and cf.
   {File}.]
   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.                     --Tillotson.

   {Filth disease} (Med.), a disease supposed to be due to
      pollution of the soil or water.

Source : WordNet®

filth
     n 1: any substance considered disgustingly foul or unpleasant
          [syn: {crud}, {skank}]
     2: the state of being covered with unclean things [syn: {dirt},
         {grime}, {soil}, {stain}, {grease}, {grunge}]
     3: a state characterized by foul or disgusting dirt and refuse
        [syn: {filthiness}, {foulness}, {nastiness}]