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See also: équivalence


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From French équivalence, from Medieval Latin aequivalentia.



equivalence (countable and uncountable, plural equivalences)

  1. (uncountable) The condition of being equivalent or essentially equal.
  2. (countable, mathematics) An equivalence relation; ; ~
  3. (uncountable, logic) The relationship between two propositions that are either both true or both false.
  4. (chemistry) The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valency.
  5. a Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function.
  6. (geometry) A number in intersection theory. A positive-dimensional variety sometimes behaves formally as if it were a finite number of points; this number is its equivalence.



equivalence (third-person singular simple present equivalences, present participle equivalencing, simple past and past participle equivalenced)

  1. (transitive) To be equivalent or equal to; to counterbalance.
    (Can we find and add a quotation of Sir Thomas Browne to this entry?)