Dictionary.net

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"

persistent in occurrence and unvarying in nature; "maintained a constant temperature"; "a constant beat"; "principles of unvarying validity"; "a steady breeze"

a quantity that does not vary

steadfast in purpose or devotion or affection; "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"

continually recurring or continuing without interruption; "constant repetition of the exercise"; "constant chatter of monkeys"

persistent in occurrence and unvarying in nature; "maintained a constant temperature"; "a constant beat"; "principles of unvarying validity"; "a steady breeze"

a quantity that does not vary

steadfast in purpose or devotion or affection; "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"

continually recurring or continuing without interruption; "constant repetition of the exercise"; "constant chatter of monkeys"

Not liable, or given, to change; permanent; regular; continuous; continually recurring; steadfast; faithful; not fickle.

Remaining unchanged or invariable, as a quantity, force, law, etc.

Consistent; logical.

A quantity that does not change its value; -- used in countradistinction to variable.

A number whose value, when ascertained (as by observation) and substituted in a general mathematical formula expressing an astronomical law, completely determines that law and enables predictions to be made of its effect in particular cases.

A number expressing some property or condition of a substance or of an instrument of precision; as, the dielectric constant of quartz; the collimation constant of a transit instrument.

A number whose value, when ascertained (as by observation) and substituted in a general mathematical formula expressing an astronomical law, completely determines that law and enables predictions to be made of its effect in particular cases.

A number expressing some property or condition of a substance or of an instrument of precision; as, the dielectric constant of quartz; the collimation constant of a transit instrument.

Continuous; faithful; firm; steadfast; true; unchanging; regular.

That which is not subject to change, as gravity.

Constantly.

Fixed, unchangeable: continual: faithful.

That which remains unchanged.

That which remains unchanged.

Firm; fixed; unchanged; steadfast; unchangeable, as in mind, purpose, affection, or principle; determined; invariably the same.

Fixed; unchangeable; faithful; continual.

Steady; persevering; faithful; invariable.

Fixed; firm; unchangeable; firm in mind or principle; steady; faithful in affection; without intermission.

That which remains unchanged, as the laws of gravity or the revolutions of the earth; a quantity which remains the same throughout a problem.

Changeless; invariable; characters, structures.

In electrophysics, uninterrupted; not accompanied by marked variations of intensity.

In physics, a value which is not subject to variation and which therefore serves as a unit of measurement, or as an unchanged factor in a given equation.

n. That which is not subject to change; —quantity whose value always remains the same in the problem.

Firm, not fluid; unvaried, unchanged; firm, resolute, free from change of affection ; certain, not various.