variable variable /ˈvɛriːəbəl/

adjective

1. () Liable to or capable of change  ( variable )
   liable to or capable of change
    Rainfall in the tropics is notoriously variable
   rainfall in the tropics is notoriously variable
    Variable winds
   variable winds
    Variable expenses
   variable expenses
   
2. () Marked by diversity or difference  ( variable , varying )
   marked by diversity or difference
    The varying angles of roof slope
   the varying angles of roof slope
    Nature is infinitely variable
   nature is infinitely variable
   
3. () (used of a device) designed so that a property (as e.g. light) can be varied  ( variable )
   (used of a device) designed so that a property (as e.g. light) can be varied
    A variable capacitor
   a variable capacitor
    Variable filters in front of the mercury xenon lights
   variable filters in front of the mercury xenon lights
   

noun

1. () Something that is likely to vary; something that is subject to variation  ( variable )
   something that is likely to vary; something that is subject to variation
    The weather is one variable to be considered
   the weather is one variable to be considered
   
2. () A quantity that can assume any of a set of values  ( variable quantity , variable )
   a quantity that can assume any of a set of values
   
3. A symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity  ( variable )
   a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
   
4. A star that varies noticeably in brightness  ( variable , variable star )
   a star that varies noticeably in brightness