equation

/ɪˈkweɪ.ʒən/

//ɪˈkweɪ.ʒən// noun

By · According to Wiktionary data (CC BY-SA) ·

"equation" is a 8-letter English headword indexed on PlainSpell.

The verdict

“equation” is a regularly-used English word, ranked #6,901 in English word frequency and used as a noun.

#6,901
frequency rank, English
8
letters
11
tracked misspellings
6
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The act or process of equating two or more things, or the state of those things being equal (that is, identical).

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

equation vs equator
75% similar
equation vs eruption
75% similar
equation vs elation
75% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for equation
PropertyValue
Headwordequation
LanguageEnglish
Part of speechNoun
IPA/ɪˈkweɪ.ʒən/
Letters8
Frequency rank#6,901
Misspellings tracked11
Confusable pairs6
SourceWiktionary (kaikki.org)

Where “equation” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). equation lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for equation is 8 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ɪˈkweɪ.ʒən/. Corpus data places it at rank #6,901 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.

Our generated misspelling index lists 11 likely wrong-spelling variants for equation, with forms such as "eqaution", "eqquation", and "equaiton". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 6 confusable-pair relationships, "equator", "eruption", "elation", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Old French, from Latin aequātiō (“an equalizing”). Morphologically equate + -ion The correct English form is equation, spelled E-Q-U-A-T-I-O-N.

Definition

  1. 1
    The act or process of equating two or more things, or the state of those things being equal (that is, identical).
  2. 2
    An assertion that two expressions are equal, expressed by writing the two expressions separated by an equal sign; in mathematical problems, equations describe various essential aspects of the problem, each of which contributes to the resolution of the problem in part.
  3. 3
    A small correction to observed values to remove the effects of systematic errors in an observation.

Etymology

From Old French, from Latin aequātiō (“an equalizing”). Morphologically equate + -ion

This word in other languages

ecuación(Español)équation(Français)Ausgleich(Deutsch)equação(Português)

Common misspellings

Also misspelled as: eqaution,eqquation,equaiton,equasion,equatino,equationn,equatoin,equattion,equtaion,euqation,qeuation

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of equation - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

eqaution2eqquation1equaiton2equasion1equatino2equationn1equatoin2equattion1
Edit distance from "equation"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "equation"?
"equation" is spelled E-Q-U-A-T-I-O-N. The IPA pronunciation is /ɪˈkweɪ.ʒən/.
What does "equation" mean?
As a noun, "equation" means: The act or process of equating two or more things, or the state of those things being equal (that is, identical).
What words are commonly confused with "equation"?
"equation" is commonly confused with "equator", "eruption", "elation". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "equation"?
The IPA (International Phonetic Alphabet) transcription for "equation" is /ɪˈkweɪ.ʒən/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "equation"?
From Old French, from Latin aequātiō (“an equalizing”). Morphologically equate + -ion See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “equation”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is E-Q-U-A-T-I-O-N - every other letter order is a misspelling in standard orthography.
  • Say it as /ɪˈkweɪ.ʒən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “equator” - see the side-by-side comparison. equation vs equator
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list