**equation**Line breaks: equa|tion

Pronunciation: /ɪˈkweɪʒ(ə)n/

# Definition of *equation* in English:

### noun

1

*Mathematics*A statement that the values of two mathematical expressions are equal (indicated by the sign =).
Example sentences

- It also contains continued fractions, quadratic equations, sums of power series and a table of sines.
- When I pressed him to write an equation expressing the value for a, he insisted that he would need a symbol for within.
- Now express the pattern as a mathematical equation.

2

*The process of equating one thing with another:* [ mass noun] *the***equation**of science**with**objectivity
More example sentences

- As relationships go, I realized this simple equation of life.
- I feel that I have developed some sort of equation with them.
- And can you tell us, are you concerned about second-guessing on that whole equation?

equivalence, likeness, identity, correspondence, agreement, comparison, balance, balancing

2.1 (

**the equation**) A situation in which several factors must be taken into account:*money also came into the equation*
More example sentences

- Another factor in the equation: Used equipment must compete with new equipment in the marketplace.
- Once all that is figured out, the most confusing factor in the equation must be pondered: playing time.
- When pressure of competition was factored into the equation, the situation changed.

**the situation**, the problem, the case, the question, the quandary, the predicament

3

*Chemistry*A symbolic representation of the changes which occur in a chemical reaction, expressed in terms of the formulae of the molecules or other species involved.
Example sentences

- When hydrolysis occurs, we will write a chemical equation to describe it, and new species will be formed in solution.
- The chemical equations for some reactions may have a lone reactant or a single product.
- I asked as I balanced a chemical equation and answered some questions.

### Phrases

- 1
#### equation of the first (or second etc.) order

*Mathematics*An equation involving only the first derivative, second derivative, etc.Example sentences- His doctoral dissertation was on the theory of the propeller which led to his developing a theory of partial differential equations of the second order.
- This integral was introduced in a paper on differential equations of the second order which he wrote in 1870.
- Special attention should be drawn also to his little known pamphlet on regular point of linear differential equations of the second order used for a number of years in connection with one of his courses of lectures.

### Words that rhyme with equation

abrasion, Australasian, Eurasian, evasion, invasion, occasion, persuasion, pervasion, suasion, Vespasian## Definition of **equation** in:

- US English dictionary
- English synonyms
- US English synonyms

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