- placement opposite or against.
- opposition, contrast, or antithesis.
- Logic. the inference drawn from a proposition by negating its terms and changing their order, as by inferring “Not B implies not A” from “A implies B.”
Origin of contraposition
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for contraposition
It is for dealing with these intractable moods that Contraposition is required.Logic, Inductive and Deductive
We have given examples and illustrations in the paragraph describing Conversion by Contraposition.Thought-Culture
William Walker Atkinson
A further process, known as Contraposition or Conversion by Negation, consists of conversion following on obversion.
They are all remarkable for harmonies attained by certain combinations of shade in gradations with colours in contraposition.
In this it differs from Obversion, Conversion, and Contraposition, each of which stands for one process.Logic
- the act of placing opposite or against, esp in contrast or antithesis
- logic the derivation of the contrapositive of a given categorial proposition
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 contraposition
Online Etymology Dictionary, © 2010 Douglas Harper