constancy
(noun)
noun
1. the quality of being enduring and free from change or variation
- early mariners relied on the constancy of the trade winds
Similar word(s): stability
Definition categories: attribute, changelessness, unchangeability, unchangeableness, unchangingness
2. (psychology) the tendency for perceived objects to give rise to very similar perceptual experiences in spite of wide variations in the conditions of observation
Definition categories: thought, perception
3. faithfulness and dependability in personal attachments (especially sexual fidelity)
Definition categories: attribute, faithfulness, fidelity