Definition of obvert in English:

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Pronunciation: /əbˈvərt/ Pronunciation: /äb-/


[with object] Logic
Alter (a proposition) so as to infer another proposition with a contradictory predicate, e.g., “no men are immortal to “all men are mortal.”.
Example sentences
  • An original statement is obverted, the result is converted and that result is obverted again.
  • In response to growing concern and upon the advice of a specially appointed committee, the rule was obverted.



Pronunciation: /əbˈvərZHən/ Pronunciation: /äb-/
Example sentences
  • Obversion always works if it's done right.
  • Determine which of the three new moves: conversion, contraposition or obversion has taken place between the premise and conclusion of the argument.


Early 17th century (in the sense 'turn something until it is facing'): from Latin obvertere, from ob- 'toward' + vertere 'to turn'.

For editors and proofreaders

Syllabification: ob·vert

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