aa
or a·'a, 'a·'a
basaltic lava having a rough surface.
Origin of aa
1- Compare pahoehoe.
Other definitions for a̅a̅ (2 of 7)
(in prescriptions) ana2.
Origin of a̅a̅
2Other definitions for AA (3 of 7)
Other definitions for AA (4 of 7)
a proportional shoe width size, narrower than A and wider than AAA.
the smallest proportional brassiere cup size.
a quality rating for a corporate or municipal bond, lower than AAA and higher than A.
Electricity. a battery size for 1.5-volt dry cells: diameter, 0.6 inch (1.4 centimeters); length, 2 inches (5 centimeters).
British. a designation for motion pictures certified as unsuitable for children under 14 unless accompanied by an adult.: Compare A3 (def. 10), U5 (def. 6), X3 (def. 9).
Other definitions for a.a. (5 of 7)
author's alteration. : Also A.A., AA
Other definitions for A.A. (6 of 7)
or AA
Other definitions for A.A. (7 of 7)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use aa in a sentence
He consoled himself, however, with the reflection that he was perhaps doing important service to his friend Da-a-a-vid Laidlaw.
The Garret and the Garden | R.M. BallantyneFor if a is kept as the key-note, the octave a-a with one ♭ is the so-called Dorian (e-e on the white notes).
The Modes of Ancient Greek Music | David Binning MonroIf the genus is Chromatic, as M. Ruelle is disposed to think, they are g-a-a♯-b-d-e-f.
The Modes of Ancient Greek Music | David Binning MonroLooking down he saw fifty stabbing pencils of flame flickering from fifty A-A guns.
Tam O' The Scoots | Edgar Wallace"Twelve or fourteen cars passed here—just—now east—running a-a-a-" Callahan sprang up like a flash—listened.
The Nerve of Foley | Frank H. Spearman
British Dictionary definitions for aa (1 of 3)
/ (ˈɑːɑː) /
a volcanic rock consisting of angular blocks of lava with a very rough surface
Origin of aa
1British Dictionary definitions for aa (2 of 3)
ana 1
British Dictionary definitions for AA (3 of 3)
Alcoholics Anonymous
anti-aircraft
Architectural Association
(in Britain) Automobile Association
(in Britain) Advertising Association
(in Britain, formerly) a film that may not be shown publicly to a child under fourteen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for aa
[ ä′ä ]
A type of lava having a rough, jagged surface. It is relatively slow moving in its molten state, advancing in the form of massive blocks with fissured and angular surfaces that ride on a viscous interior. The blocks range in size between the size of a football and the size of a house. See Note at pahoehoe.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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