/ Dictionary / Index U undigestible: Meaning and Definition of Find definitions for: un•di•gest•i•ble Pronunciation: (un"di-jes'tu-bul, -dī-), [key] — adj. indigestible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. undies undine 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