[in-di-sting-gwi-shuh-buh l]


not distinguishable.
indiscernible; imperceptible.

Origin of indistinguishable

First recorded in 1600–10; in-3 + distinguishable
Related formsin·dis·tin·guish·a·ble·ness, in·dis·tin·guish·a·bil·i·ty, nounin·dis·tin·guish·a·bly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for indistinguishable

identical, duplicate, equivalent, like, same, tantamount, twin, identic

Examples from the Web for indistinguishable

Contemporary Examples of indistinguishable

Historical Examples of indistinguishable

  • The colours were indistinguishable at the distance, drenched and sodden.

    Old Man Curry

    Charles E. (Charles Emmett) Van Loan

  • Both in looks and behavior he is indistinguishable from other strong rats.

  • A camel is indistinguishable from a peanut—if only their humps be considered.

  • The solar system was behind them, indistinguishable from the other stars.

    Mezzerow Loves Company

    Floyd L. Wallace

  • The voices that came down to them were jumbled, faint, indistinguishable.

    Spring Street

    James H. Richardson

British Dictionary definitions for indistinguishable



(often postpositive foll by from) identical or very similar (to)twins indistinguishable from one another
not easily perceptible; indiscernible
Derived Formsindistinguishability or indistinguishableness, nounindistinguishably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for indistinguishable

c.1600, from in- (1) "not, opposite of" + distinguishable. Related: Indistinguishably.

Online Etymology Dictionary, © 2010 Douglas Harper