disjunction

/dɪsˈdʒʌŋk(t)ʃən/

//dɪsˈdʒʌŋk(t)ʃən// noun

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

"disjunction" is a 11-letter English headword indexed on PlainSpell.

The verdict

“disjunction” is an uncommon English word, ranked #74,900 in English word frequency and used as a noun.

#74,900
frequency rank, English
11
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The act of disjoining; disunion, separation.

Key facts for disjunction
PropertyValue
Headworddisjunction
LanguageEnglish
Part of speechNoun
IPA/dɪsˈdʒʌŋk(t)ʃən/
Letters11
Frequency rank#74,900
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “disjunction” 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). disjunction 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 disjunction is 11 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /dɪsˈdʒʌŋk(t)ʃən/. Corpus data places it at rank #74,900 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 5 distinct senses for this headword, so context determines which meaning a reader should apply.

The misspelling generator found no plausible variants for disjunction, since its letter pattern doesn't lend itself to common typo substitutions. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From Old French disjunction, from Latin disiunctiō. The correct English form is disjunction, spelled D-I-S-J-U-N-C-T-I-O-N.

Definition

  1. 1
    The act of disjoining; disunion, separation.
  2. 2
    The state of being disjoined, contrasting, or opposing.
  3. 3
    The proposition resulting from the combination of two or more propositions using the or operator.
  4. 4
    A logical operator that results in “true” when any of its operands are true.
  5. 5
    During meiosis, the separation of chromosomes (homologous in meiosis I, and sister chromatids in meiosis II).

Etymology

From Old French disjunction, from Latin disiunctiō.

Synonyms

disjuncture

Antonyms

junction

This word in other languages

disjonction(Français)Disjunktion(Deutsch)disjunção(Português)

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 "disjunction"?
"disjunction" is spelled D-I-S-J-U-N-C-T-I-O-N. The IPA pronunciation is /dɪsˈdʒʌŋk(t)ʃən/.
What does "disjunction" mean?
As a noun, "disjunction" means: The act of disjoining; disunion, separation.
How do you pronounce "disjunction"?
The IPA (International Phonetic Alphabet) transcription for "disjunction" is /dɪsˈdʒʌŋk(t)ʃən/. 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 "disjunction"?
From Old French disjunction, from Latin disiunctiō. 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 “disjunction”

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

  • The one correct English spelling is D-I-S-J-U-N-C-T-I-O-N - every other letter order is a misspelling in standard orthography.
  • Say it as /dɪsˈdʒʌŋk(t)ʃən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • 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