v. t. - Firm; solid; fixed; immovable; -- opposed to fluid.
v. t. - Not liable, or given, to change; permanent; regular; continuous; continually recurring; steadfast; faithful; not fickle.
v. t. - Remaining unchanged or invariable, as a quantity, force, law, etc.
v. t. - Consistent; logical.
n. - That which is not subject to change; that which is invariable.
n. - A quantity that does not change its value; -- used in countradistinction to variable.
n. - 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.
n. - 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.