equation

noun

equa·​tion i-ˈkwā-zhən How to pronounce equation (audio)
 also  -shən
1
a
: the act or process of equating
b(1)
: an element affecting a process : factor
(2)
: a complex of variable factors
c
: a state of being equated
specifically : a state of close association or identification
bring governmental enterprises and payment for them into immediate equation R. G. Tugwell
2
a
: a usually formal statement of the equality or equivalence of mathematical or logical expressions
b
: an expression representing a chemical reaction quantitatively by means of chemical symbols

Examples of equation in a Sentence

the equation of material wealth with happiness
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Choose The Right Partner Technology is only half the equation. Ashar Samdani, Forbes.com, 24 Apr. 2025 After determining the most promising options, researchers then adjusted the guns to calculate an equation focused on a shield stack’s efficacy and performance. Andrew Paul, Popular Science, 24 Apr. 2025 The Trump Administration has repeatedly equated pro-Palestinian activism with anti-semitism—an equation challenged by the participation of Jewish students and activists among those protesting Israel’s conduct in the Gaza war. Juwayriah Wright, Time, 23 Apr. 2025 But climate change is altering that equation, especially in places like New England where coastal waters are warming faster than almost anywhere on earth, according to the National Oceanic and Atmospheric Administration, especially in winter, fueling a green crab boom. Jacob Wycoff, CBS News, 23 Apr. 2025 See All Example Sentences for equation

Word History

First Known Use

14th century, in the meaning defined at sense 1a

Time Traveler
The first known use of equation was in the 14th century

Browse Nearby Words

Cite this Entry

“Equation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/equation. Accessed 30 Apr. 2025.

Kids Definition

equation

noun
equa·​tion i-ˈkwā-zhən How to pronounce equation (audio)
 also  -shən
1
: the act or process of equating : the state of being equated
2
a
: a statement of the equality of two mathematical expressions
b
: an expression involving chemical symbols for a chemical reaction

Medical Definition

equation

noun
equa·​tion
i-ˈkwā-zhən also -shən
: an expression representing a chemical reaction quantitatively by means of chemical symbols
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!