■ adjective
1》 occurring continuously.
2》 remaining the same.
↘faithful and dependable.
■ noun an unchanging situation.
↘ Mathematics a component of a relationship between variables that does not change its value.
↘ Physics a number expressing a relation or property which remains the same in all circumstances, or for the same substance under the same conditions.
Derivatives
constancy noun
~ly adverb
Origin
ME: from OFr., from L. ~- , constare 'stand firm', from con- 'with' + stare 'stand'.