• synonyms


[kon-stuh n-see]
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  1. the quality of being unchanging or unwavering, as in purpose, love, or loyalty; firmness of mind; faithfulness.
  2. uniformity or regularity, as in qualities or conditions; invariableness.
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Origin of constancy

From the Latin word constantia, dating back to 1520–30. See constant, -ancy


See more synonyms for constancy on Thesaurus.com
1. resolution, steadfastness, fidelity, fealty, loyalty, devotion. 2. permanence, regularity, dependability.


1. irresolution, infidelity. 2. fickleness.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for constancies

Historical Examples

  • Sensible experiences group themselves round these constancies.

    Essays Towards a Theory of Knowledge

    Alexander Philip

British Dictionary definitions for constancies


  1. the quality of having a resolute mind, purpose, or affection; steadfastness
  2. freedom from change or variation; stability
  3. psychol the perceptual phenomenon in which attributes of an object appear to remain the same in a variety of different presentations, e.g., a given object looks roughly the same size regardless of its distance from the observer
  4. ecology the frequency of occurrence of a particular species in sample plots from a plant community
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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

Word Origin and History for constancies



1520s, from constance + -cy.

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Online Etymology Dictionary, © 2010 Douglas Harper