/ Dictionary / Index F filth: Meaning and Definition of Find definitions for: filth Pronunciation: (filth), [key] — n. offensive or disgusting dirt or refuse; foul matter: the filth dumped into our rivers. foul condition: to live in filth. moral impurity, corruption, or obscenity. vulgar or obscene language or thought. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: filth (Thesaurus) filter tip filthy Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language