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American Dictionary of the English Language

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Variable


VA'RIABLE, adjective

1. That may vary or alter; capable of alteration in any manner; changeable; as variable winds or seasons; variable colors.

2. Susceptible of change; liable to change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable

His heart I know, how variable and vain.

3. In mathematics, subject to continual increase or decrease; in opposition to constant, retaining the same value.

VA'RIABLE, noun In mathematics, a quantity which is in a state of continual increase or decrease. The indefinitely small quantity by which a variable is continually increased or diminished, is called its differential, and the method of finding these quantities, the differential calculus.