an·​til·​o·​gism | \ anˈtiləˌjizəm\
plural -s

Definition of antilogism

: an inconsistent triad of propositions in logic of which two are premises of a valid syllogism while the third is the contradictory of its conclusion

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Other Words from antilogism

antilogistic \ (ˈ)⸗¦⸗⸗¦jistik \ adjective
antilogistically \ -​tə̇k(ə)lē \ adverb

History and Etymology for antilogism

Late Greek antilogismos, from Greek anti- anti- entry 1 + logismos calculating, reasoning, from logizesthai to calculate, from logos word, computation

Keep scrolling for more

Comments on antilogism

What made you want to look up antilogism? Please tell us where you read or heard it (including the quote, if possible).


one from the Upper Peninsula of Michigan

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!