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[ih-kwiv-uh-luh ns or for 3, ee-kwuh-vey-luh ns]
/ɪˈkwɪv ə ləns or for 3, ˌi kwəˈveɪ ləns/

1.

the state or fact of being equivalent; equality in value, force, significance, etc.

2.

an instance of this; an equivalent.

3.

Chemistry. the quality of having equal valence.

4.

Logic, Mathematics.

- Also called material implication. the relation between two propositions such that the second is not false when the first is true.
- Also called material equivalence. the relation between two propositions such that they are either both true or both false.
- the relation between two propositions such that each logically implies the other.

5.

(of a logical or mathematical relationship) reflexive, symmetrical, and transitive.

Origin

1535-1545

Related forms

nonequivalence, noun

Dictionary.com Unabridged

Based on the Random House Dictionary, © Random House, Inc. 2014.

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Based on the Random House Dictionary, © Random House, Inc. 2014.

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Examples for equivalence

- Written language is thus a point-to-point
*equivalence*, to borrow a mathematical phrase, to its spoken counterpart. - Only the clerks know what is available, only they judge the
*equivalence*and can give or take a few square meters here and there. - Harmonic quintessence and the formulation of a fundamental energy
*equivalence*equation. - Capital and income are not taxed with any mathematical
*equivalence*, and inflation is not directly addressed. - There is no
*equivalence*between the acceptance of evolution and the global warming agenda. - The formulation of harmonic quintessence and a fundamental energy
*equivalence*equation. - Here, the kind of
*equivalence*used represents a restrictive aspect of reality as an economic one. - See now you can go see what the
*equivalence*is between the gases. - Greg--Even for you, that's a ridiculous
*equivalence*. - But it's also a false moral
*equivalence*to say that because all of the actors are flawed, they are all equally bad.

British Dictionary definitions for equivalence

/ɪˈkwɪvələns/

noun

1.

the state of being equivalent or interchangeable

2.

(maths, logic)

- the relationship between two statements, each of which implies the other
- Also called biconditional. 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

/ˌɛkwɪˈveɪlənsɪ/

noun

1.

(chem) the state of having equal valencies

Derived Forms

equivalent, adjective

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

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© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins

Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cite This Source

Word Origin and History for equivalence

equivalence

1540s, from Fr. équivalence, from M.L. aequivalentia, from aequivalentem (see equivalent). Related: Equivalency (1530s).

Online Etymology Dictionary, © 2010 Douglas Harper

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