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equivalence |
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equivalence [ɪˈkwɪvələns], equivalency n 1. the state of being equivalent or interchangeable 2. (Philosophy / Logic) Maths Logic a. the relationship between two statements, each of which implies the other b. the binary truth-function that takes the value true when both component sentences are true or when both are false, corresponding to English if and only if. Symbol: ≡ or ↔ , as in -(p ⋀ q) ≡ -p ⋁ -q Also called biconditional Equivalence neck and neck Even, equal, on a par; abreast, at the same pace. Based on available citations, figurative use of this expression is as old as the literal horse-racing one, both dating from the early 19th century. It still finds frequent application. Production ran neck and neck in the studios, but the second version … reached the public screen last. (The Times, June, 1955) nip and tuck So close as to be of uncertain outcome; neck and neck, on a par, even; up in the air, questionable. This chiefly U.S. term is of puzzling origin and inconsistent form, appearing in print in the 1800s as rip and tuck, nip and tack, and nip and chuck, before assuming its present nip and tuck. Its original restriction to contexts describing close contests, usually athletic, lends credence to the claim that it originated as a wrestling term (Barrère and Leland, Dictionary of Slang, 1890). The expression is now employed in much broader contexts, indicative of any kind of uncertainty. It is nip and tuck whether such a last great achievement of the bipartisan foreign policy can be ratified before … the Presidential race. (The Economist, May, 1948) ThesaurusLegend: Synonyms Related Words Antonyms
equivalence noun equality, correspondence, agreement, similarity, identity, parallel, match, parity, conformity, likeness, sameness, parallelism, evenness, synonymy, alikeness, interchangeableness the equivalence of science and rationalism Translations Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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