Definition of equation
1a : the act or process of equatingb (1) : an element affecting a process : factor (2) : a complex of variable factorsc : 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>
2a : a usually formal statement of the equality or equivalence of mathematical or logical expressionsb : 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
14th Century
First Known Use of equation
14th century
Other Mathematics and Statistics Terms
EQUATION Defined for English Language Learners
equation
playDefinition of equation for English Language Learners

mathematics : a statement that two expressions are equal (such as 8 + 3 = 11 or 2x – 3 = 7)

: a complicated situation or issue

: the act of regarding two things as the same : the act of equating things
EQUATION Defined for Kids
equation
playDefinition of equation for Students
1 : a statement of the equality of two mathematical expressions
2 : an expression representing a chemical reaction by means of chemical symbols
Medical Dictionary
equation
playMedical Definition of equation
: an expression representing a chemical reaction quantitatively by means of chemical symbols
Learn More about equation

See words that rhyme with equation Spanish Central: Translation of equation Nglish: Translation of equation for Spanish speakers Britannica English: Translation of equation for Arabic speakers Britannica.com: Encyclopedia article about equation
Seen and Heard
What made you want to look up equation? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!