[ee-kwuh-pol-uh nt, ek-wuh-]


equal in power, effect, etc.; equivalent.
Logic. (of propositions, propositional forms, etc.) logically equivalent in any of various specified ways.


an equivalent.

Origin of equipollent

1375–1425; late Middle English < Latin aequipollent- (stem of aequipollēns) of equal value, equivalent to aequi- equi- + pollent- (stem of pollēns) able, present participle of pollēre to be strong
Related formse·qui·pol·lence, e·qui·pol·len·cy, noune·qui·pol·lent·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for equipollent

Historical Examples of equipollent

  • The condition and the major term are "equipollent" in their extension.

  • At first, ‘spirit and matter,’ ‘soul and body,’ stood for a pair of equipollent substances quite on a par in weight and interest.

  • Equipollent, e-kwi-pol′ent, adj. having equal power or force: equivalent.

  • Hill's eloquence exceeded his judgment; Stephens' judgment was superior to his oratorical power; in Toombs these were equipollent.

    Robert Toombs

    Pleasant A. Stovall

  • But, since is and exists are equipollent, and so being and existing, is being is the same as the unimpeachable is existing.

    The Verbalist

    Thomas Embly Osmun, (AKA Alfred Ayres)

British Dictionary definitions for equipollent



equal or equivalent in significance, power, or effect
logic (of two propositions) logically deducible from each other; equivalent
maths logic (of two classes) having the same cardinality


something that is equipollent
Derived Formsequipollence or equipollency, nounequipollently, adverb

Word Origin for equipollent

C15: from Latin aequipollēns of equal importance, from equi- + pollēre to be able, be strong
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