• synonyms


[in-di-sting-gwi-shuh-buh l]
See more synonyms for indistinguishable on Thesaurus.com
  1. not distinguishable.
  2. indiscernible; imperceptible.
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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for indistinguishable

Contemporary Examples

Historical Examples

  • 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


  1. (often postpositive foll by from) identical or very similar (to)twins indistinguishable from one another
  2. not easily perceptible; indiscernible
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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.

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Online Etymology Dictionary, © 2010 Douglas Harper