equation

noun

Synonyms of equationnext
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
To bring governmental enterprises and payment for them into immediate equationR. 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.
That’s a part of the equation, but as the quarterback, production impacts leadership. Aaron Heisen, Daily News, 5 Aug. 2026 Setting the form equal to a number fixes it into an equation that can be plotted on an x-y graph—something many of us learned to do on graphing calculators in high school. Lyndie Chiou, Scientific American, 5 Aug. 2026 Algebraic equations of one form or another were employed as far back as ancient Egypt, but they were organized into a formal system considerably later. Jan Tumlir, Artforum, 5 Aug. 2026 The speed of the growth, however, was a shock to the system and was not just limited to the retail side of the equation. Richard Neal, Forbes.com, 4 Aug. 2026 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 6 Aug. 2026.

Kids Definition

equation

noun
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
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