Word.ws English Dictionary

A-1

A-1 is the alternative spelling of A1.

Noun

A-1 (plural A-1s)

  1. (US, historical) Cox-Klemin A-1 Air Ambulance, never mass produced.
  2. (US) Skyraider single engine general-purpose attack aircraft.
  3. (US) Personnel section of an air force staff.
  4. Air personnel officer.
  5. Angstrom.

Meaning of A1

Adjective

A1 (not comparable)

  1. (informal) In good health.
  2. (informal) In excellent or top condition.
  3. First-class. (Compare A 2 and A 3, which are inferior grades.)

See all 4 meanings of a1

Forms of A-1

pluralA-1s

Questions about A-1

What does A-1 mean?
A-1 means cox-Klemin A-1 Air Ambulance, never mass produced.
What is A-1 the alternative spelling of?
A-1 is the alternative spelling of A1.
What part of speech is A-1?
A-1 is a noun.
What is the plural of A-1?
The plural of A-1 is A-1s.

Words near A-1 in the dictionary

  1. A+'s
  2. A++
  3. A++s
  4. a-
  5. a- -ing
  6. A-1
  7. A-106
  8. A-106s
  9. A-109
  10. A-109s
  11. A-1s

Source and license

Adapted from Wiktionary: A-1 (page history and authors); A1 (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “A-1.” Word.ws, https://word.ws/a-1. Based on Wiktionary, CC BY-SA 4.0.