Definition of a fortiori in English:

a fortiori

Line breaks: a for¦ti|ori
Pronunciation: /ˌeɪ fɔːtɪˈɔːrʌɪ
, ˌɑː fɔːtɪˈɔːriː/

adverb & adjective

Used to express a conclusion for which there is stronger evidence than for a previously accepted one: [as adverb]: they reject all absolute ideas of justice, and a fortiori the natural-law position
More example sentences
  • Were it not so, we should have required the a fortiori reasoning for the third degree only.
  • In this way the connexive concept of implication accounts for a necessary presupposition of all conditional and a fortiori logical orientation.
  • What then is the conclusion which in true a fortiori fashion is supposed to follow resoundingly from the weaker premise?


early 17th century: Latin, from a fortiori argumento 'from stronger argument'.

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Word of the day impudicity
Pronunciation: ˌɪmpjʊˈdɪsɪti
lack of modesty