variable - definition, thesaurus and related words from WordNet-Online

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Adjective variable has 3 senses

variable - liable to or capable of change; "rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses"
Antonyms: invariable, changeless, constant, steady, unvarying, fixed-income, hard-and-fast, strict, invariant
varying, variable - marked by diversity or difference; "the varying angles of roof slope"; "nature is infinitely variable"
Antonyms: unvaried, unvarying (indirect, via varied)
variable - (used of a device) designed so that a property (as e.g. light) can be varied; "a variable capacitor"; "variable filters in front of the mercury xenon lights"
Antonym: unadaptable (indirect, via adaptable)

Noun variable has 4 senses

variable - something that is likely to vary; something that is subject to variation; "the weather is one variable to be considered"
--₁ is a kind of thing

variable, variable quantity - a quantity that can assume any of a set of values
--₂ is a kind of quantity
--₂ has particulars:

argument; independent variable, experimental variable; correlate, correlative; degree of freedom; dependent variable; predictor variable; random variable, variate, variant, stochastic variable, chance variable; scalar; tensor; vector

variable star, variable - a star that varies noticeably in brightness
--₃ is a kind of star
--₃ has particulars:
Polaris, North Star, pole star, polar star, polestar
variable - a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
--₄ is a kind of symbol
--₄ has particulars: placeholder; unknown, unknown quantity