/ Dictionary / Index I infeasible: Meaning and Definition of Find definitions for: in•fea•si•ble Pronunciation: (in-fē'zu-bul), [key] — adj. not feasible; impracticable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: infeasible (Thesaurus) infauna infect Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language