air

/ˈɛə/

//ˈɛə// noun

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

"air" is a 3-letter English headword indexed on PlainSpell.

The verdict

“air” is in the everyday core of English, ranked #418 in English word frequency and used as a noun.

#418
frequency rank, English
3
letters
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.

Visual similarity to commonly confused words

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

air vs as
33% similar
air vs at
33% similar
air vs an
33% similar

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

Key facts for air
PropertyValue
Headwordair
LanguageEnglish
Part of speechNoun
IPA/ˈɛə/
Letters3
Frequency rank#418
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “air” 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). air 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 air is 3 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈɛə/. Corpus data places it at rank #418 in overall English word frequency, putting it firmly in the everyday core of the language. Wiktionary records 17 distinct senses for this headword, so context determines which meaning a reader should apply.

air has no tracked misspelling variants, suggesting the orthography follows predictable English patterns. It also participates in 20 confusable-pair relationships, "as", "at", "an", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Etymology tree Proto-Indo-European *h₂ews- Proto-Indo-European *h₂ewsér Proto-Hellenic *auhḗr Ancient Greek ᾱ̓ήρ (āḗr)bor. Latin āēr Old French airbor. Middle English aire English air From Middle English aire, from Old French air, from Latin āēr, from Ancie… The correct English form is air, spelled A-I-R.

Definition

  1. 1
    The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.
  2. 2
    The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.
  3. 3
    The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.
  4. 4
    The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.
  5. 5
    The substance of the atmosphere on a planet other than Earth.
  6. 6
    The apparently open space above the ground which this substance fills, (historical) formerly thought to be limited by the firmament but (meteorology) now considered to be surrounded by the near-vacuum of outer space.
  7. 7
    A breeze; a gentle wind.
  8. 8
    A feeling or sense.
  9. 9
    A feeling or sense.
  10. 10
    A feeling or sense.
  11. 11
    A melody or song, especially a solo; an aria.
  12. 12
    Nothing; absence of anything.
  13. 13
    An air conditioning system.
  14. 14
    Any specific gas.
  15. 15
    The state of being briefly airborne during a jump.
  16. 16
    A television or radio signal; (by extension) media broadcasts in general.
  17. 17
    Publicity.

Etymology

Etymology tree Proto-Indo-European *h₂ews- Proto-Indo-European *h₂ewsér Proto-Hellenic *auhḗr Ancient Greek ᾱ̓ήρ (āḗr)bor. Latin āēr Old French airbor. Middle English aire English air From Middle English aire, from Old French air, from Latin āēr, from Ancient Greek ἀήρ (aḗr). Displaced native Old English lyft. More at lift, loft.

Synonyms

atmosphereauraluftnimbusgas

This word in other languages

aire(Español)air(Français)Luft(Deutsch)ar(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 "air"?
"air" is spelled A-I-R. The IPA pronunciation is /ˈɛə/.
What does "air" mean?
As a noun, "air" means: The substance constituting Earth's atmosphere: a gaseous mixture of nitrogen, oxygen, and various trace gases.
What words are commonly confused with "air"?
"air" is commonly confused with "as", "at", "an". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "air"?
The IPA (International Phonetic Alphabet) transcription for "air" is /ˈɛə/. 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 "air"?
Etymology tree Proto-Indo-European *h₂ews- Proto-Indo-European *h₂ewsér Proto-Hellenic *auhḗr Ancient Greek ᾱ̓ήρ (āḗr)bor. Latin āēr Old French airbor. Middle English aire English air From Middle English aire, from Old French air, from Latin āēr, ... 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 “air”

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

  • The one correct English spelling is A-I-R - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈɛə/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “as” - see the side-by-side comparison. air vs as
  • 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