• Dictionary
• Thesaurus
• Scrabble
• Spanish Central
• Learner's Dictionary

# equation

play
noun equa·tion \i-ˈkwā-zhən also -shən\

## Simple Definition of equation

• 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

Source: Merriam-Webster's Learner's Dictionary

## Full Definition of equation

1. 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. 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

1. the equation of material wealth with happiness

14th Century

14th century

## equation

play
noun equa·tion \i-ˈkwā-zhən\

## Definition of equation for Students

1. 1 :  a statement of the equality of two mathematical expressions

2. 2 :  an expression representing a chemical reaction by means of chemical symbols

## equation

play
noun equa·tion \i-ˈkwā-zhən also -shən\

## Medical Definition of equation

1. :  an expression representing a chemical reaction quantitatively by means of chemical symbols

## 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).

#### vamoose

play

to depart quickly

Get Word of the Day daily email!

#### WORD GAMES

Take a 3-minute break and test your skills!

Which is the correct spelling?

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

#### Words at Play

##### 'Dumbledore', 'Hippogriff', and 11 More Real Words from Harry Potter

The history behind Harry Potter

##### The Original Hipsters

Hint: they carried things on their hips

##### 'Between You and I'

Don't let this phrase come between you

##### How to Use the Subjunctive in English

If I were you, I'd watch this

##### How Often Is 'Biweekly'?

Don't get us started on 'bimonthly'

##### Irregardless

It is in fact a real word (but that doesn't mean you should use it).

##### Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

#### Word Games

##### Difficult Spelling Words Quiz

Can you spell these 15 tricky spelling words?

Take the quiz
##### Who Knew?

Take this quiz and discover 12 words for things you didn't know had words.

Take the quiz
##### Name That Thing

Test your visual vocabulary with our 10-question challenge!

Take the quiz