Constant

Firm; solid; fixed; immovable; -- opposed to fluid.

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.

That which is not subject to change; that which is invariable.

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

A fixed value that does not change

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"