Meaning of VARIABLE in English

VARIABLE

/ ˈveəriəbl; NAmE ˈver-; ˈvær-/ adjective , noun

■ adjective

1.

often changing; likely to change

SYN fluctuating :

variable temperatures

The acting is of variable quality (= some of it is good and some of it is bad) .

—compare invariable

2.

able to be changed :

The drill has variable speed control.

variable lighting

►  vari·ably / -iəbli; NAmE / adverb

■ noun

a situation, number or quantity that can vary or be varied :

With so many variables, it is difficult to calculate the cost.

The temperature remained constant while pressure was a variable in the experiment.

OPP constant

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WORD ORIGIN

late Middle English : via Old French from Latin variabilis , from variare , from varius diverse.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.