/ Dictionary / Index I indistinguishable: Meaning and Definition of Find definitions for: in•dis•tin•guish•a•ble Pronunciation: (in"di-sting'gwi-shu-bul), [key] — adj. not distinguishable. indiscernible; imperceptible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: indistinguishable (Thesaurus) indistinctive indite 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