Definition of "equivalence" []

• The state or condition of being equivalent; equality. (noun)
• Mathematics An equivalence relation. (noun)
• Logic The relationship that holds for two propositions that are either both true or both false, so that the affirmation of one and the denial of the other results in contradiction. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "It was then, also, that he coined the term equivalence principle."
• "The tripe about moral equivalence is just cover for ignorant wingnuts to argue that the US SHOULDNT do what is right."
• "To make that false equivalence is to parade your ignorance."