Dictionary & Thesaurus

constancy

1.	(noun) the quality of being free from change or variation
	Synonyms: stability
	Related Words: changelessness, unchangeability, unchangeableness, unchangingness
	Antonyms: inconstancy

2.	(noun) faithfulness in personal attachment (especially sexual fidelity)
	Related Words: faithfulness, fidelity

3.	(noun) the tendency for perceived objects to give rise to very similar perceptual experiences in spite of wide variations in the conditions of observation
	Related Words: brightness constancy, color constancy, colour constancy, perception, shape constancy, size constancy