Constant

Webster's Dictionary of the English Language

·vt Consistent; logical.

II. Constant ·vt Firm; solid; fixed; immovable;

— opposed to fluid.

III. Constant ·noun That which is not subject to change; that which is invariable.

IV. Constant ·vt Remaining unchanged or invariable, as a quantity, force, law, ·etc.

V. Constant ·noun A quantity that does not change its value;

— used in countradistinction to variable.

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

VII. Constant ·add. ·noun 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.

VIII. Constant ·add. ·noun 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.