Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for constant from the 1913 edition of Webster's Revised Unabridged Dictionary. Define constant using one of the most comprehensive free online dictionaries on the web.

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constant
Part of Speech: noun
Results: 2
1. 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.
2. 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.
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