• synonyms


  1. incontestable because of having been demonstrated or proved to be demonstrable.
  2. Logic. (of a proposition) necessarily true or logically certain.
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Also ap·o·deic·tic [ap-uh-dahyk-tik] /ˌæp əˈdaɪk tɪk/, ap·o·dic·ti·cal.

Origin of apodictic

1645–55; < Latin apodīcticus < Greek apodeiktikós proving fully. See apo-, deictic
Related formsap·o·dic·ti·cal·ly, ap·o·deic·ti·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for apodeictic

Historical Examples

  • I shall term this the demonstrative or apodeictic employment of reason.

    The Critique of Pure Reason

    Immanuel Kant

  • These principles cannot be derived from experience, for it would give neither strict universality, nor apodeictic certainty.

  • I divide all apodeictic propositions, whether demonstrable or immediately certain, into dogmata and mathemata.

  • In the former case, the dogmatist must take care that his arguments possess the apodeictic certainty of a demonstration.

  • All these indications in the Bible show that the doctrine of creation is capable of apodeictic proof.

British Dictionary definitions for apodeictic


apodictic (ˌæpəˈdɪktɪk)

  1. unquestionably true by virtue of demonstration
  2. logic archaic
    1. necessarily true
    2. asserting that a property holds necessarily
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Derived Formsapodeictically or apodictically, adverb

Word Origin

C17: from Latin apodīcticus, from Greek apodeiktikos clearly demonstrating, from apodeiknunai to demonstrate
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 apodeictic



"clearly demonstrated," 1650s, from Latin apodicticus, from Greek apodeiktikos, from apodeiktos, verbal adjective of apodeiknynai "to show off, demonstrate," literally "to point away from" (other objects, at one), from apo "off, away" (see apo-) + deiknynai "to show" (see diction).

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Online Etymology Dictionary, © 2010 Douglas Harper