English

Adjective

A-1 ‎(not comparable)

1. Alternative spelling of A1

Noun

A-1 ‎(plural A-1s)

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