koan

/ˈkəʊ.ɑːn/

//ˈkəʊ.ɑːn// noun

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

"koan" is a 4-letter English headword indexed on PlainSpell.

The verdict

“koan” is uncommon English (frequency #88,512 among 1,236 “K” headwords), classed as a noun. The kind of spelling people second-guess.

#88,512
frequency rank, English
1,236
“K” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A story about a Zen master and his student, sometimes like a riddle, other times like a fable or parable, which has become an object of Zen study, and which, when meditated upon, may unlock mechani...

Corpus desk

Index EN-koan · koan · English

koan · rank #88,512 · 0 variants · 0 confusables

  • FREQ-RARE #88,512
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 1,236
  • PHOTO-FINISH Knuth

Nearest frequency peer: Knuth (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Long-tail ranks near “koan”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “koan” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for koan
PropertyValue
Headwordkoan
LanguageEnglish
Part of speechNoun
IPA/ˈkəʊ.ɑːn/
Letters4
Frequency rank#88,512
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “koan” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).koanfalls in this rarity band:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Rare peers in the same band: “Knuth” (#88,511), “Koc” (#88,513), “knuckled” (#88,510). Among 1,236 “K” headwords, “koan” is #88,512. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

koan is uncommon English at frequency #88,512 among 1,236 “K” headwords, classed as anoun, transcribed /ˈkəʊ.ɑːn/. Rarity is why readers land here mid-draft. 3 senses are on record.

We couldn't generate a plausible misspelling set for koan, since its letter sequence doesn't invite the usual edit-distance slips. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From Japanese 公案 (kōan), derived from Chinese 公案 (gōng'àn, “official business”). The correct English form is koan, spelled K-O-A-N.

Definition

  1. 1
    A story about a Zen master and his student, sometimes like a riddle, other times like a fable or parable, which has become an object of Zen study, and which, when meditated upon, may unlock mechanisms in the Zen student’s mind leading to satori.
  2. 2
    A riddle with no solution, used to provoke reflection on the inadequacy of logical reasoning, and to lead to enlightenment.
  3. 3
    A therapy technique used by Traditional Chinese medicinal physicians or medical practitioners to break a presenting patients habitual pattern of thinking that has been diagnosed as the primary cause of an illness or disease.

Recorded use

Wiktionary examples

These source excerpts show how koan appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Zen, with its absurdist koan, laughs at life much the way the Marx brothers did. What exactly can you make of a philosophical system whose teacher answers the question, "How do you see things so clearly?" with the seeming one-liner, "I close my eyes"?
  2. Gibberish. Or else a koan that Achtfaden isn’t equipped to master, a transcendent puzzle that could lead him to some moment of light.

Etymology

From Japanese 公案 (kōan), derived from Chinese 公案 (gōng'àn, “official business”).

This word in other languages

aporía(Español)aporie(Français)Koan(Deutsch)

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 "koan"?
"koan" is spelled K-O-A-N. The IPA pronunciation is /ˈkəʊ.ɑːn/.
What does "koan" mean?
As a noun, "koan" means: A story about a Zen master and his student, sometimes like a riddle, other times like a fable or parable, which has become an object of Zen study, and which, when meditated upon, may unlock mechani...
How do you pronounce "koan"?
The IPA (International Phonetic Alphabet) transcription for "koan" is /ˈkəʊ.ɑːn/. 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 "koan"?
From Japanese 公案 (kōan), derived from Chinese 公案 (gōng'àn, “official business”). 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "koan", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

Klug#88,507lari#88,527kalo#88,492lish#88,542

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

Source: FrequencyWords open word-frequency list