/ Dictionary / Index F filleting: Meaning and Definition of Find definitions for: fil•let•ing Pronunciation: (fil'i-ting), [key] — n. Building Trades. material, as mortar, used as a substitute for flashing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: filleting (Thesaurus) fillet fillet weld Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language