a-a
a-a is the alternative form of aa.
a-a is the abbreviation of air-to-air.
Meaning of aa
Noun
aa (uncountable)
- A form of lava flow associated with Hawaiian-type volcanoes, consisting of basaltic rock, usually dark-colored with a jagged and loose, clinkery surface. Compare pahoehoe.
- We...saw ‘pahoihoi’ or solid lava forming, and also ‘aa’ or clinkers.1859, R. C. Haskell, American journal of science and arts, series XXVIII
Meaning of air-to-air
Adjective
air-to-air (not comparable)
- With the participants being two or more aircraft in flight.
- The attack also afforded Helena to a front-seat view of literal air-to-air melee combat, as one Wildcat pilot of the Cactus Air Force, who was swooping in to help break up the attack, found himself out of machine-gun ammo; instead, he dropped his landing gear, positioned himself above the nearest...2021 March 10, Drachinifel, 5:50 from the start, in Guadalcanal Campaign - The Big Night Battle: Night 1 (IJN 3(?) : 2 USN), archived from the original on 17 Oct 2022
- Fired from an aircraft in flight at another one.
Adjective capitalized: A-a
A-a (not comparable)
Origin of a-a
Initialism of alveolar and arterial.
Questions about a-a
- What is a-a the alternative form of?
- A-a is the alternative form of aa.
- What part of speech is a-a?
- A-a is an adjective.
Words near a-a in the dictionary
Source and license
Adapted from Wiktionary: a-a (page history and authors); A-a (page history and authors); aa (page history and authors); air-to-air (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-a.” Word.ws, https://word.ws/a-a. Based on Wiktionary, CC BY-SA 4.0.