A variable is an attribute of a physical or an abstract system which may change its value while it is under observation. Examples include the height of a child, the temperature ...

Definition of variable from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star's actual luminosity, or to variations in the amount of the star's light that is blocked from reaching Earth. Many, possibly most, stars have at least some variation in luminosity: the energy output of our Sun, for example, varies by about 0.1% over an 11 year solar cycle.Discovery · Types of variability · Variable star ... · Classification

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A variable (pronounced /ˈveərɪəbl/) is an attribute of a physical or an abstract system which may change its value while it is under observation. Examples include the height of a child, the temperature across a state, or the input to a function. The concept variable is used in all areas of mathematics, science and engineering.Hist ory · General overview · Mathematics · Computer programming

variable. In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation. Commonly used variables include x and y (real-number unknowns), z ...

adjective. apt or likely to change or vary; changeable, inconstant, fickle, fluctuating, etc. that can be changed or varied; Biol. tending to deviate in some way from the type ...

adjective . 1. apt or liable to vary or change; changeable: variable weather; variable moods. 2. capable of being varied or changed; alterable: a variable time limit for completion ...

var·i·a·ble   (vâr--b l, v r-) adj. 1. a. Likely to change or vary; subject to variation; changeable. b. Inconstant; fickle. 2. Biology Tending to deviate, as from a normal or ...