/ Dictionary / Index I indecipherable: Meaning and Definition of Find definitions for: in•de•ci•pher•a•ble Pronunciation: (in"di-sī'fur-u-bul), [key] — adj. not decipherable; illegible. not understandable; incomprehensible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: indecipherable (Thesaurus) indeciduous indecision 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