# Constant

## Definition of Constant

Con´stant   Pronunciation: kǒn´stant
a.1.Firm; solid; fixed; immovable; - opposed to fluid.
If . . . you mix them, you may turn these two fluid liquors into a constant body.
2.Not liable, or given, to change; permanent; regular; continuous; continually recurring; steadfast; faithful; not fickle. Opposite of changeable and variable.
Both loving one fair maid, they yet remained constant friends.
I am constant to my purposes.
His gifts, his constant courtship, nothing gained.
Onward the constant current sweeps.
3.(Math. & Physics) Remaining unchanged or invariable, as a quantity, force, law, etc.
4.Consistent; logical.
n.1.That which is not subject to change; that which is invariable.
2.(Math.) A quantity that does not change its value; - used in countradistinction to variable.
3.(Astron.) 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.
4.(Physics) 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.
5.(Computers) a data structure that does not change during the course of execution of a program. It may be a number, a string, or a more complex data structure; - contrasted with variable.
 Aberration constant (Astron.) a number which by substitution in the general formula for aberration enables a prediction to be made of the effect of aberration on a star anywhere situated. Its value is 20.47.
 Absolute constant (Math.) one whose value is absolutely the same under all circumstances, as the number 10, or any numeral.
 Arbitrary constant an undetermined constant in a differential equation having the same value during all changes in the values of the variables.
 Gravitation constant (Physics) the acceleration per unit of time produced by the attraction of a unit of mass at unit distance. When this is known the acceleration produced at any distance can be calculated.
 Solar constant (Astron.) the quantity of heat received by the earth from the sun in a unit of time. It is, on the C. G. S. system, 0.0417 small calories per square centimeter per second.
 Constant of integration (Math.) an undetermined constant added to every result of integration.- Young.

## Related Words

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