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[kon-stuh n-see] /ˈkɒn stən si/
the quality of being unchanging or unwavering, as in purpose, love, or loyalty; firmness of mind; faithfulness.
uniformity or regularity, as in qualities or conditions; invariableness.
Origin of constancy
1520-30; < Latin constantia. See constant, -ancy
1. resolution, steadfastness, fidelity, fealty, loyalty, devotion. 2. permanence, regularity, dependability.
1. irresolution, infidelity. 2. fickleness. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for constancy
Contemporary Examples
Historical Examples
  • Not a word against her constancy and courage could any one, then or after, find to say.

    Jeanne d'Arc Mrs.(Margaret) Oliphant
  • And this constancy forms the very essence of necessity, nor have we any other idea of it.

  • I do not concern myself with what others may say of conduct or of constancy.

    54-40 or Fight Emerson Hough
  • The necessity of dying created all the constancy of philosophers.

    Reflections Francois Duc De La Rochefoucauld
  • Her tones played with the constancy of an ever-living fountain.

    The Lions of the Lord Harry Leon Wilson
  • Think you her faithfulness to him is the constancy of a woman to her lover?

    St. Martin's Summer Rafael Sabatini
British Dictionary definitions for constancy


the quality of having a resolute mind, purpose, or affection; steadfastness
freedom from change or variation; stability
(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
(ecology) the frequency of occurrence of a particular species in sample plots from a plant community
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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Word Origin and History for constancy

1520s, from constance + -cy.

Online Etymology Dictionary, © 2010 Douglas Harper
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