• synonyms


[in-di-fen-suh-buh l]
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  1. not justifiable; inexcusable: indefensible behavior.
  2. incapable of being protected or defended against attack: an indefensible town.
  3. incapable of being defended against criticism or denial; untenable: indefensible argument.
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Origin of indefensible

First recorded in 1520–30; in-3 + defensible
Related formsin·de·fen·si·bil·i·ty, in·de·fen·si·ble·ness, nounin·de·fen·si·bly, adverb


See more synonyms for indefensible on Thesaurus.com
2. vulnerable, defenseless, unprotected.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for indefensible


  1. not justifiable or excusable
  2. capable of being disagreed with; untenable
  3. incapable of defence against attack
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Derived Formsindefensibility or indefensibleness, nounindefensibly, 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 indefensible


1520s, from in- (1) "not, opposite of" + defensible. Related: Indefensibly.

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Online Etymology Dictionary, © 2010 Douglas Harper