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variable

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variable
I
variable1 AC /ˈveəriəbəl $ ˈver-/ adjective
 Word Family: noun: variable, variance, variant, variety, variability, variation; adjective: variableinvariable, varied, various; adverb: variablyinvariably, variously; verb: vary
1. likely to change often ⇨ vary:
    Expect variable cloudiness and fog tomorrow.
    Interest rates can be highly variable.
    variable in size/shape/colour etc
    These fish are highly variable in color and pattern.
2. sometimes good and sometimes bad:
    The quality of pork is often less variable than beef.
3. able to be changed:
    The heater has variable temperature settings.
—variably adverb
—variability /ˌveəriəˈbɪləti, ˌveəriəˈbɪlɪti $ ˌver-/ noun [uncountable]

II
variable2 AC noun [countable]
 Word Family: noun: variable, variance, variant, variety, variability, variation; adjective: variableinvariable, varied, various; adverb: variablyinvariably, variously; verb: vary
1. something that may be different in different situations, so that you cannot be sure what will happen
   OPP  constant:
    There are too many variables in the experiment to predict the result accurately.
2. technical a mathematical quantity which can represent several different amounts
   OPP  constant