/ Dictionary / Index B befoul: Meaning and Definition of Find definitions for: be•foul Pronunciation: (bi-foul'), [key] — v.t. to make dirty or filthy; soil; defile; sully: a bird that befouls its own nest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: befoul (Thesaurus) beforetime befriend Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language