from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Involving, of the nature of, or being a contradiction: synonym: opposite.
  • adjective Given to contradicting.
  • noun Either of two propositions related in such a way that it is impossible for both to be true or both to be false.

from The Century Dictionary.

  • Denying that something stated or approved is completely true; diametrically opposed.
  • Inconsistent; logically antagonistic; incapable of being true together (though both may be false).
  • Synonyms Contrary, Inconsistent, etc. See contrary.
  • noun pl. contradictories (-riz). A proposition of a pair inconsistent with each other, or each of which precisely denies or falsifies the other.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Affirming the contrary; implying a denial of what has been asserted; also, mutually contradicting; inconsistent.
  • adjective Opposing or opposed; repugnant.
  • noun A proposition or thing which denies or opposes another; contrariety.
  • noun (Logic) propositions with the same terms, but opposed to each other both in quality and quantity.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective That contradicts something, such as an argument.
  • adjective That is itself a contradiction.
  • adjective That is diametrically opposed to something.
  • adjective Mutually exclusive.
  • adjective Tending to contradict or oppose, contrarious
  • noun logic Any of a pair of propositions, that cannot both be true or both be false.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective in disagreement
  • adjective that confounds or contradicts or confuses
  • adjective unable to be both true at the same time
  • adjective of words or propositions so related that both cannot be true and both cannot be false
  • noun two propositions are contradictories if both cannot be true (or both cannot be false) at the same time


Sorry, no etymologies found.


Help support Wordnik (and make this page ad-free) by adopting the word contradictory.



Log in or sign up to get involved in the conversation. It's quick and easy.