[ kon-stuhn-see ]
See synonyms for constancy on
  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.

Origin of constancy

From the Latin word constantia, dating back to 1520–30; see constant, -ancy

Other words for constancy

Opposites for constancy

Words Nearby constancy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use constancy in a sentence

British Dictionary definitions for constancy


/ (ˈkɒnstənsɪ) /

  1. the quality of having a resolute mind, purpose, or affection; steadfastness

  2. freedom from change or variation; stability

  1. 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

  2. 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