/ Dictionary / Index F filar: Meaning and Definition of Find definitions for: fi•lar Pronunciation: (fī'lur), [key] — adj. of or pertaining to a thread or threads. having threads or the like. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: filar (Thesaurus) filamentous filaria Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language