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

noun, Also, (for defs 1, 2).
the state or fact of being equivalent; equality in value, force, significance, etc.
an instance of this; an equivalent.
Chemistry. the quality of having equal valence.
Logic, Mathematics.

(of a logical or mathematical relationship) reflexive, symmetrical, and transitive.
the state of being equivalent or interchangeable
(maths, logic)


1540s, from French équivalence, from Medieval Latin aequivalentia, from aequivalentem (see equivalent). Related: Equivalency (1530s).


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  • Equivalence-relation

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