- changeless, constant, invariant, steady, unvarying - persistent in occurrence and unvarying in nature; "maintained a constant temperature"; "a constant beat"; "principles of unvarying validity"; "a steady breeze"
Antonym: variable (indirect, via invariable)
- constant - continually recurring or continuing without interruption; "constant repetition of the exercise"; "constant chatter of monkeys"
Antonym: sporadic (indirect, via continual)
- constant - steadfast in purpose or devotion or affection; "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"
Antonyms: inconstant, false, untrue, fickle, volatile
- ceaseless, constant, incessant, never-ending, perpetual, unceasing, unremitting - uninterrupted in time and indefinitely long continuing; "the ceaseless thunder of surf"; "in constant pain"; "night and day we live with the incessant noise of the city"; "the never-ending search for happiness"; "the perpetual struggle to maintain standards in a democracy"; "man's unceasing warfare with drought and isolation"; "unremitting demands of hunger"
Antonyms: discontinuous, noncontinuous (indirect, via continuous)
- constant, constant quantity - a quantity that does not vary
--1 is a kind of quantity
--1 has particulars: parameter, parametric quantity - constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"
--2 is a kind of number
--2 has particulars: