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Origin of conclusive

1580–90; < Late Latin conclūsīvus, equivalent to Latin conclūs(us) (past participle of conclūdere to conclude; see conclusion) + -īvus -ive
Related formscon·clu·sive·ly, adverbcon·clu·sive·ness, nounnon·con·clu·sive, adjectivenon·con·clu·sive·ly, adverbnon·con·clu·sive·ness, noun

Synonyms for conclusive

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1. definitive, determining. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for conclusiveness

Historical Examples of conclusiveness

  • “You thought he might be Nofri,” she added, with a triumphant air of conclusiveness.


    George Eliot

  • And in proof of the conclusiveness of his opinion all the wrinkles vanished from his face.

    War and Peace

    Leo Tolstoy

  • These works are valuable and authoritative, but their conclusiveness may be disputed.

  • The conclusiveness of testimony is designated moral certainty.

    A Logic Of Facts

    George Jacob Holyoake

  • Nothing can exceed the conclusiveness of experiments of this character.

    Sleep and Its Derangements

    William A. Hammond

British Dictionary definitions for conclusiveness


  1. putting an end to doubt; decisive; final
  2. approaching or involving an end or conclusion
Derived Formsconclusively, adverbconclusiveness, noun
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 conclusiveness



1610s, "occurring at the end," from French conclusif, from Late Latin conclusivus, from conclus-, past participle stem of concludere (see conclude). Meaning "definitive, decisive, convincing" (putting an end to debate) is from 1640s. Related: Conclusiveness.

Online Etymology Dictionary, © 2010 Douglas Harper