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

      

    constancy

     noun
    noun
    BrE BrE//ˈkɒnstənsi//
     
    ; NAmE NAmE//ˈkɑːnstənsi//
     
    [uncountable](formal)
     
    jump to other results
  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 Origin late 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