Definition of equation noun from the Oxford Advanced Learner's Dictionary

      

    equation

     noun
    noun
    BrE BrE//ɪˈkweɪʒn//
     
    ; NAmE NAmE//ɪˈkweɪʒn//
     
    Mathematical terminology
     
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  1. 1[countable] (mathematics) a statement showing that two amounts or values are equal, for example 2x + y = 54 Wordfinderalgebra, arithmetic, calculus, equation, geometry, logarithm, maths, numeracy, problem, trigonometry See related entries: Mathematical terminology
  2. 2[uncountable, singular] the act of making something equal or considering something as equal (= of equating them) The equation of wealth with happiness can be dangerous.
  3. 3[countable, usually singular] a problem or situation in which several things must be considered and dealt with When children enter the equation, further tensions may arise within a marriage.
  4. Word Origin late Middle English: from Latin aequatio(n-), from aequare ‘make equal’, from aequus ‘even, level, equal’.Extra examples Money also comes into the equation. The availability of public transport is also part of the equation. The ideal gas equation is derived from this model. This can be shown by a simple equation. the equation for a straight line the numbers on the right-hand side of the equation the range of values of ξ which would satisfy this equation
See the Oxford Advanced American Dictionary entry: equation