steadfast in purpose or devotion or affection; "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"
a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"
a quantity that does not vary (同)constant quantity, invariable
standing still; "the car remained stationary with the engine running"
not capable of being moved; "stationary machinery"
the quality of being enduring and free from change or variation; "early mariners relied on the constancy of the trade winds" (同)stability
faithfulness and dependability in personal attachments (especially sexual fidelity)
(psychology) the tendency for perceived objects to give rise to very similar perceptual experiences in spite of wide variations in the conditions of observation (同)perceptual constancy