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See more synonyms for syllogize on Thesaurus.com
verb (used with or without object), syl·lo·gized, syl·lo·giz·ing.
  1. to argue or reason by syllogism.
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Also especially British, syl·lo·gise.

Origin of syllogize

1375–1425; late Middle English silogysen < Late Latin syllogizāre < Greek syllogízesthai to reason, equivalent to syl- syl- + logízesthai to reckon, infer, equivalent to lóg(os) discourse (see logos) + -izesthai -ize
Related formssyl·lo·gi·za·tion, nounsyl·lo·giz·er, nounnon·syl·lo·giz·ing, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for syllogize

Historical Examples

  • The great question of the future will be to syllogize or not to syllogize.

    Buchanan's Journal of Man, September 1887


  • He does not syllogize; he exhorts, recalls and convicts by assertion.

    The Expositor's Bible

    George Adam Smith

  • Yet there are some instances of the actions of brutes which seem to show that they, too, can syllogize.

    Novum Organum

    Francis Bacon

British Dictionary definitions for syllogize



  1. to reason or infer by using syllogisms
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Derived Formssyllogization or syllogisation, nounsyllogizer or syllogiser, noun

Word Origin

C15: via Old French from Late Latin syllogizāre, from Greek sullogizesthai; see syllogism
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