Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

contrapositive

play
noun con·tra·pos·i·tive \-ˈpä-zə-tiv, -ˈpäz-tiv\

Definition of contrapositive

  1. :  a proposition or theorem formed by contradicting both the subject and predicate or both the hypothesis and conclusion of a given proposition or theorem and interchanging them <“if not-B then not-A ” is the contrapositive of “if A then B ”>



1870

First Known Use of contrapositive

1870

Rhymes with contrapositive


Seen and Heard

What made you want to look up contrapositive? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of, relating to, or near a shore

Get Word of the Day daily email!