Webster
✕

Webster’s Revised Unabridged Dictionary · 1913

Variable

Va′ri·a·ble (vā′rĭ·ȧ·b'l), a. [L. variabilis: cf. F. variable.]

1. Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.

2. Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.

Lest that thy love prove likewise variable. Shak.

His heart, I know, how variable and vain! Milton.

Variable exhaust (Steam Eng.), a blast pipe with an adjustable opening. — Variable quantity (Math.), a variable. — Variable stars (Astron.), fixed stars which vary in their brightness, usually in more or less uniform periods.

Syn. — Changeable; mutable; fickle; wavering; unsteady; versatile; inconstant.

Va′ri·a·ble, n. 1. That which is variable; that which varies, or is subject to change.

2. (Math.) A quantity which may increase or decrease; a quantity which admits of an infinite number of values in the same expression; a variable quantity; as, in the equation x2 - y2 = R2, x and y are variables.

3. (Naut.) (a) A shifting wind, or one that varies in force. (b) pl. Those parts of the sea where a steady wind is not expected, especially the parts between the trade-wind belts.

Independent variable (Math.), that one of two or more variables, connected with each other in any way whatever, to which changes are supposed to be given at will. Thus, in the equation x2 - y2 = R2, if arbitrary changes are supposed to be given to x, then x is the independent variable, and y is called a function of x. There may be two or more independent variables in an equation or problem. Cf. Dependent variable, under Dependent.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty. Of the others, 1,362 (a word or a single letter each) were inferred by AI from the context by the dictionary’s own rules and are marked with a wavy underline (tap or point at one to see the note); the rest, which could not be inferred with confidence, are left as “?”.