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ac

Definition, pronunciation, etymology, and usage for the English word. Free spelling reference powered by Wiktionary.

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Letters

2 characters

Language

English

word origin

Source

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Detailed reference entry for the English word "ac", 2-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Hunspell error dictionaries, and usage frequency ranked against the top 100,000 English words in the Wordfreq corpus. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "ac" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "ac" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.

AC is aEnglishnoun. It means: Initialism of absolute ceiling. It ranks #4,646 in English word frequency. Often confused with as and at.

Key facts for AC
PropertyValue
HeadwordAC
LanguageEnglish
Part of speechNoun
Letters2
Frequency rank#4,646
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency rank visualization

Position of AC in English word frequency (lower rank = more common)

Source: Wordfreq corpus

Spelling & Dictionary Insight

The English entry for AC is 2 letters long, classified as anoun. Corpus data places it at rank #4,646 in overall English word frequency, indicating it appears regularly in written and spoken text.Wiktionary records 28 distinct senses for this headword, so context determines which meaning a reader should apply.

No frequent misspelling variants are recorded for AC in our index, suggesting the orthography either follows predictable English patterns or the word is uncommon enough that typo corpora lack signal.It also participates in 20 confusable-pair relationships, "as", "at", "an", and more, where similar look or sound leads writers to substitute one word for another in context.

No explicit etymology string is stored for this entry, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is AC, spelled A-C, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.

Definition

  1. 1
    Initialism of absolute ceiling.
  2. 2
    Initialism of access control.
  3. 3
    Initialism of account current.
  4. 4
    Initialism of anterior chamber.
  5. 5
    Initialism of adult contemporary (a radio format).
  6. 6
    Initialism of adenylyl cyclase.
  7. 7
    Initialism of adjuvant chemotherapy.
  8. 8
    Initialism of air conditioning.
  9. 9
    Initialism of air corps.
  10. 10
    Initialism of aircraftman.
  11. 11
    Initialism of alternating current (often used to indicate an alternating potential rather than a current).
  12. 12
    Initialism of alternating current (often used to indicate an alternating potential rather than a current).
  13. 13
    Initialism of area code.
  14. 14
    Initialism of army corps.
  15. 15
    Initialism of athletic club.
  16. 16
    Initialism of author's correction.
  17. 17
    Initialism of automobile club.
  18. 18
    Initialism of Auxiliary Collier (a naval coal transport that travels with the fleet to provide coal for coal-powered warships).
  19. 19
    Initialism of axiom of choice.
  20. 20
    Initialism of assistant commissioner, a police rank used in London's Metropolitan Police.
  21. 21
    Companion of the Order of Australia.
  22. 22
    Initialism of aviation cadet.
  23. 23
    Initialism of ammonium chloride.
  24. 24
    Initialism of autonomous county.
  25. 25
    Initialism of armor class.
  26. 26
    singular of ACs (“autistics and cousins”).
  27. 27
    Initialism of administrative custody.
  28. 28
    Anglo-Catholic.

This word in other languages

Spanish(Español)Portuguese(Português)French(Français)German(Deutsch)

Frequency rank: #4,646 in English

Frequently Asked Questions

How do you spell "AC"?
"AC" is spelled A-C.
What does "AC" mean?
As a noun, "AC" means: Initialism of absolute ceiling.
What words are commonly confused with "AC"?
"AC" is commonly confused with "as", "at", "an". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "AC" come from?
"AC" is a English word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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.

Nearby English words

Other entries that begin with the letter A in our English index:

All "A" wordsABCDEFGHIJKL

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Data Source: Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Frequency data from Wordfreq. Misspellings derived from Hunspell dictionaries.