Definition of variable adjective from the Oxford Advanced Learner's Dictionary

      

    variable

     adjective
    adjective
    BrE BrE//ˈveəriəbl//
     
    ; NAmE NAmE//ˈveriəbl//
     
    , NAmE//ˈværiəbl//
     
     
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  1. 1often changing; likely to change synonym fluctuating variable temperatures The acting is of variable quality (= some of it is good and some of it is bad). compare invariable
  2. 2able to be changed The drill has variable speed control. variable lighting
  3. Word Familyvary verbvaried adjectivevariable adjectivevariation nounvarious adjectivevariety noun Word Origin late Middle English: via Old French from Latin variabilis, from variare, from varius ‘diverse’.Extra examples These systems are infinitely variable. variable in shape The acting is of variable quality. The forecast is based on assumptions of variable temperature. The kitchen boasts stylish units and variable lighting.
See the Oxford Advanced American Dictionary entry: variable