View synonyms for equation


[ ih-kwey-zhuhn, -shuhn ]


  1. the act of equating or making equal; equalization:

    the symbolic equation of darkness with death.

  2. equally balanced state; equilibrium.
  3. Mathematics. an expression or a proposition, often algebraic, asserting the equality of two quantities.
  4. Also called chem·i·cal e·qua·tion [kem, -i-k, uh, l i-, kwey, -zh, uh, n, -sh, uh, n]. Chemistry. a symbolic representation showing the kind and amount of the starting materials and products of a reaction.


/ ɪˈkweɪʒən; -ʃən /


  1. a mathematical statement that two expressions are equal: it is either an identity in which the variables can assume any value, or a conditional equation in which the variables have only certain values (roots)
  2. the act of regarding as equal; equating
  3. the act of making equal or balanced; equalization
  4. a situation, esp one regarded as having a number of conflicting elements

    what you want doesn't come into the equation

  5. the state of being equal, equivalent, or equally balanced
  6. a situation or problem in which a number of factors need to be considered
  7. astronomy See personal equation


/ ĭ-kwāzhən /

  1. Mathematics.
    A written statement indicating the equality of two expressions. It consists of a sequence of symbols that is split into left and right sides joined by an equal sign. For example, 2 + 3 + 5 = 10 is an equation.
  2. Chemistry.
    A written representation of a chemical reaction, in which the symbols and amounts of the reactants are separated from those of the products by an equal sign, arrow, or a set of opposing arrows. For example, Ca(OH) 2 + H 2 SO 4 = CaSO 4 + 2H 2 O, is an equation.

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Derived Forms

  • eˈquational, adjective
  • eˈquationally, adverb

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Other Words From

  • non·e·qua·tion noun

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Word History and Origins

Origin of equation1

1350–1400; Middle English < Latin aequātiōn- (stem of aequātiō ) an equalizing. See equate, -ion

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Example Sentences

The right-hand side of the equations describes the contents of the universe — anything that has mass and energy.

In other words, machines that augment or supersede organic biology and change the equation limiting the scope of how, where, and when “genetic” information can be shared and transferred.

The scientists took this curve and developed a new mathematical equation to calculate a dog’s age.

Whatever the reason, once these individuals become infected and are removed from the equation through death or immunity, the effect on the pandemic is outsized.

The equations of general relativity let them evolve independently, and, crucially, you can flatten the universe by changing either.

Perhaps, like Hawking searching for his elegant equation, filmmakers will never find the answer.

But vibrant industry requires solid infrastructure, which is where the Chinese government enters the equation.

Until that equation tips, individual Republicans may break ranks on gay rights, but the party remains a countercultural bastion.

“We want to take out those biases, those prejudices, out of the equation, to remove those barriers,” says Halfteck.

Sadly, the “small room” part of that equation seems to have been a one-time thing.

Now the trouble with the main proposition just quoted is that each side of the equation is used as the measure of the other.

In other words, it is a truism, mere equation in terms, telling nothing whatever.

The fundamental equation of the economist, then, is that the value of everything is proportionate to its cost.

We are ourselves a term in the equation, a note of the chord, and make discord or harmony almost at will.

Inserting these values in our general equation and calculating the result, we obtain 18.1E6 as the value of the constant.