Meaning of VARIABLE in English
[adjective], nounIf something is variable, it is likely to change frequently.The variable performance of the laboratories doing the testing means that the results cannot be relied on.Increasingly more companies are establishing variable pay programmes to reward top performers on their staff.British weather is perhaps at its most variable in the spring.(specialized) A variable is something which can change.The data was analysed according to neighbourhoods, but other key variables like credit rating, job history, savings and marital status were ignored altogether.
Cambridge English vocab. Кембриджский английский словарь. 2012