• synonyms


[in-kuh n-tes-tuh-buh l]
See more synonyms for incontestable on Thesaurus.com
  1. incapable of being contested; not open to dispute; incontrovertible: incontestable proof.
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Origin of incontestable

First recorded in 1665–75; in-3 + contestable
Related formsin·con·test·a·bil·i·ty, in·con·test·a·ble·ness, nounin·con·test·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for incontestable

absolute, authoritative, clear, conclusive, definite, demonstrable, destined, determined, evident, firm, fixed, genuine, guaranteed, hard, inarguable, incontrovertible, indisputable, indubitable, infallible, irrefutable

Examples from the Web for incontestable

Contemporary Examples of incontestable

Historical Examples of incontestable

  • This is quite another matter; my right of priority is incontestable.

    The Field of Ice

    Jules Verne

  • But, after all, what incontestable defect in it has any one succeeded in demonstrating?

    The Verbalist

    Thomas Embly Osmun, (AKA Alfred Ayres)

  • The highest tribute which he pays them is that their loyalty is incontestable.

  • That I take it by my own incontestable right and not of your hand, by your bounty and your charity?

    Tristram of Blent

    Anthony Hope

  • There it was, malignant and incontestable, the mark of the thing on his brow.

British Dictionary definitions for incontestable


  1. incapable of being contested or disputed
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Derived Formsincontestability or incontestableness, nounincontestably, 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 incontestable


1670s, from French incontestable, from in- "not" (see in- (1)) + contestable (see contest (v.)). Related: Incontestably.

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Online Etymology Dictionary, © 2010 Douglas Harper