VA'RIABLE, a.
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, n. 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.