contrapositive

[ kon-truh-poz-i-tiv ]
/ ˌkɒn trəˈpɒz ɪ tɪv /
Logic.

adjective

of or relating to contraposition.

noun

a contrapositive statement of a proposition.

Origin of contrapositive

First recorded in 1855–60; contraposit(ion) + -ive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for contrapositive

British Dictionary definitions for contrapositive

contrapositive

/ (ˌkɒntrəˈpɒzɪtɪv) /

adjective

placed opposite or against

noun

logic
  1. a conditional statement derived from another by negating and interchanging antecedent and consequent
  2. a categorial proposition obtained from another, esp validly, by any of a number of operations including negation, transferring the terms, changing their quality, and also possibly weakening from universal to particular
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