ad hoc

/ˌæd ˈhɒk/

//ˌæd ˈhɒk// adj

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

"ad-hoc" is a 5-letter English headword indexed on PlainSpell.

The verdict

“ad hoc” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.

Unranked
below top-frequency English
6
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - For a particular purpose.

Key facts for ad hoc
PropertyValue
Headwordad hoc
LanguageEnglish
Part of speechAdjective
IPA/ˌæd ˈhɒk/
Letters6
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “ad hoc” sits in English frequency

ad hoc falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

ad hoc is uncommon English outside the top frequency list, classed as anadjective, transcribed /ˌæd ˈhɒk/. Rarity is why readers land here mid-draft. 4 senses are on record.

No misspelling variants are generated for ad hoc in our index, since its letter pattern doesn't lend itself to common typo substitutions. This entry stands alone in our confusable dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: Learned borrowing from New Latin ad hoc (“to this, for this”). The correct English form is ad hoc, spelled A-D- -H-O-C.

Definition

  1. 1
    For a particular purpose.
  2. 2
    Created on the spur of the moment; impromptu.
  3. 3
    Postulated solely to save a theory from being falsified, without making any new predictions.
  4. 4
    Independent of previously instated network structure, like routers or access points.

Etymology

Learned borrowing from New Latin ad hoc (“to this, for this”).

This word in other languages

ad hoc(Español)ad hoc(Français)ad hoc(Deutsch)ad hoc(Português)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "ad hoc"?
"ad hoc" is spelled A-D- -H-O-C. The IPA pronunciation is /ˌæd ˈhɒk/.
What does "ad hoc" mean?
As an adjective, "ad hoc" means: For a particular purpose.
How do you pronounce "ad hoc"?
The IPA (International Phonetic Alphabet) transcription for "ad hoc" is /ˌæd ˈhɒk/. 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 "ad hoc"?
Learned borrowing from New Latin ad hoc (“to this, for this”). 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 “ad hoc”

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

  • The one correct English spelling is A-D- -H-O-C - every other letter order is a misspelling in standard orthography.
  • Say it as /ˌæd ˈhɒk/ (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