a fortiori

UK/ˌeɪ ˌfɔːɹtiˈɔːɹaɪ/UK/ˌeɪ ˌfɔːɹtiˈɔːɹi/UK/ˌɑː-/US/ˌeɪ ˌfoɹʃiˈoɹˌaɪ/

adjective

With stronger or greater reason; as a corollary implied by a stronger claim; even more so; all the more so; so much the more.

Meanings

adjectivea fortiori (comparative more a fortiori, superlative most a fortiori)

comparative more a fortiori · superlative most a fortiori

  1. rhetorichuman sciencesWith stronger or greater reason; as a corollary implied by a stronger claim; even more so; all the more so; so much the more.
adverba fortiori (comparative more a fortiori, superlative most a fortiori)

comparative more a fortiori · superlative most a fortiori

  1. rhetorichuman sciencesWith stronger or greater reason; as a corollary implied by a stronger claim.

    Now starting and stopping cannot themselves have starts or stops, or, a fortiori, middles either.

    1954, Gilbert Ryle, “dilemma vii: Perception”, in Dilemmas: The Tarner Lectures, 1953, The Syndics of the Cambridge University Press, page 103
    1 more example

    We're bound to accept an a fortiori claim because of our prior acceptance of a weaker application of the same reasoning. Frank can't run to the store in less than five minutes, and the restaurant is several blocks further away than the store. Thus, a fortiori, Frank can't run to the restaurant in less than five minutes.

    2011, Mortimer Jerome Adler, How to Prove There Is a God

Origin

  1. Medieval Latinā fortiōrī
  2. Englisha fortiori

Unadapted borrowing from Medieval Latin ā fortiōrī.

Full word history & related roots →

Translations

Dutch a fortiori
  • a fortioriTranslations
Finnish sitä suuremmalla syyllä
  • sitä suuremmalla syylläTranslations
French a fortiori
  • a fortioriTranslations
German a fortiori
  • a fortioriTranslations
Greek και δη, κατά μείζονα λόγο
  • και δη (kai di)Translations
  • κατά μείζονα λόγο (katá meízona lógo)Translations
Hebrew קַל וָחֹמֶר
  • קַל וָחֹמֶר (qal vaḥómer)Translations
Hungarian végképp, különösen
  • végképpTranslations
  • különösenTranslations
  • főlegTranslations
  • annál inkábbTranslations
  • annál is inkábbTranslations
  • még inkábbTranslations
Italian a fortiori
  • a fortioriTranslations
Korean 더더군다나
  • 더더군다나 (deodeogundana)Translations
Latin a fortiori
  • a fortioriTranslations
Norwegian Bokmål a fortiori
  • a fortioriTranslations
Persian به طریق اولی
  • به طریق اولی (be tarighe owla)Translations
Polish co więcej, tym bardziej
  • co więcejTranslations
  • tym bardziejTranslations
Spanish a fortiori, con mayor razón
  • a fortioriTranslations
  • con mayor razónTranslations
  • a fortioriTranslations
  • con mayor razónTranslations

Rhymes & wordplay

Rhymes with a fortiori

All rhymes →
Cite this entry
APA

a fortiori. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/a%20fortiori

MLA

“a fortiori.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/a%20fortiori. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “a fortiori,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/a%20fortiori.

Source: a fortiori on Wiktionary, CC BY-SA 4.0.