variable

Meanings

1. 1
   adj

   Likely to change or able to change.

   Rainfall in the tropics is notoriously variable from year to year.

2. 2
   adj

   Designed so that an amount or setting can be adjusted.

   This fan has a variable speed control.

3. 3
   noun

   Something that can change and that may affect a result.

   There are several variables to consider before we make a decision.

4. 4
   noun

   In maths, a symbol such as x or y that stands for a quantity that can change.

   In the equation, x is the variable you need to solve for.

Borrowed into Middle English in the 14th century from Old French variable, from Latin variare (“to change”), from varius (“different, various”). Equates to English vary + -able.

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