[ kon-truh-puh-zish-uhn ]
/ ˌkɒn trə pəˈzɪʃ ən /
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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.”



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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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Origin of contraposition

First recorded in 1545–55, contraposition is from the Late Latin word contrāposition- (stem of contrāpositiō). See contra1, position
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for contraposition

British Dictionary definitions for contraposition

/ (ˌkɒntrəpəˈzɪʃən) /


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