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variable (EN)
adjective, noun

adjective “variable”

base form variable (more/most)
  1. likely to change or be changed; not consistent
    The weather is variable in spring, sometimes sunny and sometimes rainy.
  2. allowed to change; not fixed
    In physics equations, variable quantities like velocity can change over time.

noun “variable”

singular variable, plural variables
  1. an element, feature, or factor that can change
    We need to consider all variables that might affect the outcome of the experiment.
  2. (in mathematics) a quantity that can take on different values
    In the equation y = mx + b, x and y are variables representing numbers.
  3. (in programming) a named area in memory to store data that can change during program execution
    The programmer initialized a variable to store the user's age.