from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Lava having a rough surface.

from The Century Dictionary.

  • noun A form of cooled lava-stream of which the surface consists of jagged and irregular blocks.
  • noun An abbreviation of Assistant Adjutant-General.
  • In recipes, an abbreviation equivalent, when used after the names of several ingredients, to ‘of each one take.’

from the GNU version of the Collaborative International Dictionary of English.

  • noun acronym for associate in arts, a college degree granted for successful completion of a two-year course of study in arts or general topics.
  • noun Acronym. Alcoholics Anonymous.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • initialism always afloat
  • initialism ana

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an international organization that provides a support group for persons trying to overcome alcoholism
  • noun an associate degree in arts
  • noun a dry form of lava resembling clinkers


from The American Heritage® Dictionary of the English Language, 4th Edition

[Hawaiian ‘a‘ā, to burn, aa.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Hawaiian ʻaʻā.


Help support Wordnik (and make this page ad-free) by adopting the word aa.


  • Well, in Norwegian aa - å, and is sorted last, while in English aa are just double a and comes before ab.

    The obvious lack of a rubber chicken magnio 2006

  • The three companies of the 16th Battalion camped in aa triangular formation with battalion headquarters located in the center and approximately 10 minutes 'walk from each company.


  • Worse, with more than two copies of some genes, each as likely as the next to have SNPs, some of those no doubt resulting in aa substitutions, a few of which may present alternative binding functionality in configurative operation, any or all modifiable post-translation, each coordinated with potentially operative expression suites with a number of other genes with other forms and functions, it doesn't look much like we'll ever be able to pin all THAT down either.

    Demarcation as Politics 2006

  • We'll post the attributes of an invalid user with screen name aa/noyes and email address anoyes@example, com.

    Recently Uploaded Slideshows midpoint 2009

  • Then shall we be worthy of bearing the same name aa those heroes who planted their victorious standards on the banks of the river Jordan, with the same hands with which they guided tiie plough aod, the shuttle.

    The Monthly mirror: reflecting men and manners; with strictures on their epitome, the stage .. 1795

  • nenu ralchina chemata chukkala avirera/ aa akasaniko neelibottuni diddindee….

    Untouchable Spring .... అంటరాని వసంతం kesav 2007

  • nenu ralchina chemata chukkala avirera/ aa akasaniko neelibottuni diddindee….

    Archive 2007-11-01 kesav 2007

  • To get a sense of language patterns of the era, Dr. Smithline studied the 80,000 letter-characters contained in Jefferson's State of the Union addresses, and counted the frequency of occurrences of "aa," "ab," "ac," through "zz."

    Two Centuries On, a Cryptologist 2009

  • Nobody showcases a word with an "aa" like Schlemihl Lefty.

    Archive 2007-02-01 C N Heidelberg 2007

  • The "aa" means that you hold the vowel sound for two beats as opposed to one.

    Arabic for Dummies Bouchentouf, Amine 2006


Log in or sign up to get involved in the conversation. It's quick and easy.

  • great word for scrabble players to know

    December 1, 2006

  • A type of lava surface in which the surface was too stiff to flow well, and so broke up into fragments. It is characterised by broken material which can vary from simple lumps to very sharp prickly fragments. It grades to pahoehoe

    December 9, 2006

  • Sharp pointy hardened lava rock. It's Onomatopoeia! - Hawaiian from the involuntary sound you make when trying to walk across it in bare feet, pronounced : "Ah!Ah!"

    December 9, 2006

  • baasic lava???!!!

    March 29, 2008

  • lavalava

    March 29, 2008

  • ought to be a'a', b/c of the glottal stops.

    May 21, 2009

  • Genus name of an orchid described in 1854. This name, presumably, would be among the first in a telephone directory.

    September 19, 2009

  • I believe it was The Professor and the Madman that first tossed this word at me, but having the meaning "a small, limpid stream." I think. Leastways, I'm good with it.

    July 30, 2010

  • This single-vowel word should be tagged "monovolcanic" as well as monovocalic.

    January 2, 2011