Definition of constancy noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈkɒnstənsi//
    ; NAmE NAmE//ˈkɑːnstənsi//
    [uncountable] (formal)
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  1. 1the quality of staying the same and not changing the constancy of temperature inside the plane
  2. 2(approving) the quality of being faithful synonym fidelity He admired her courage and constancy.
  3. Word Originlate 15th cent.: from Latin constantia, from constant- ‘standing firm’, from the verb constare, from con- ‘with’ + stare ‘stand’.
See the Oxford Advanced American Dictionary entry: constancy