Auxiliary Territorial Service (organized in 1941 for women serving in the British army; became part of army in 1949 as WRAC). Unabridged


American Temperance Society.
American Tract Society.
American Transport Service.


2 [aht, at]
a money of account of Laos, the 100th part of a kip.

1950–55; < Lao; compare Thai ʔàt formerly, a copper coin worth one eighth of a füang, ultimately < Pali aṭṭha eight Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
at1 (æt)
1.  used to indicate location or position: are they at the table?; staying at a small hotel
2.  towards; in the direction of: looking at television; throwing stones at windows
3.  used to indicate position in time: come at three o'clock
4.  engaged in; in a state of (being): children at play; stand at ease; he is at his most charming today
5.  (in expressions concerned with habitual activity) during the passing of (esp in the phrase at night): he used to work at night
6.  for; in exchange for: it's selling at four pounds
7.  used to indicate the object of an emotion: angry at the driver; shocked at his behaviour
8.  slang where it's at the real place of action
[Old English æt; related to Old Norse at to, Latin ad to]

at2 (ɑːt, æt)
n , pl at
a Laotian monetary unit worth one hundredth of a kip
[from Thai]

the internet domain name for

the chemical symbol for
1.  astatine
symbol for
2.  Also: A ampere-turn

abbreviation for
attainment target

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. æt, common P.Gmc. (cf. O.N., Goth. at, O.Fris. et, O.H.G. az), from PIE *ad- "to, near, at" (cf. L. ad "to, toward" Skt. adhi "near"). Lost in Ger. and Du., which use their equivalent of to; in Scandinavian, however, to has been lost and at fills its place. At-home (n.) "reception of visitors"
is from 1745; baseball at-bat "player's turn at the plate" is from 1941. The colloquial use of at after where ("where it's at") is attested from 1859. In choosing between at church, in church, etc. at is properly distinguished from in or on by involving some practical connection; a worshipper is at church; a tourist is in the church. At last is recorded from late 13c.; adv. phrase at least was in use by 1775. At in M.E. was used freely with prepositions (e.g. at after, which is in Shakespeare), but this has faded with the exception of at about, which was used in modern times by Trollope, Virginia Woolfe, D.H. Lawrence, and Evelyn Waugh, but nonetheless is regarded as a sign of incompetent writing by my copy editor bosses.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

The symbol for the element astatine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
The symbol for astatine.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

ATS definition

Attribute Translation System

The Free On-line Dictionary of Computing, © Denis Howe 2010
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American Heritage
Abbreviations & Acronyms
  1. ampere-turn

  2. astatine

  1. achievement test

  2. advanced technology

  3. air temperature

  4. antitank

  5. Atlantic Time

  6. automatic transmission

Agreed to Senate
  1. against the spread

  2. alternate to suspension

  3. American Temperance Society

  4. American Thoracic Society

  5. American Tract Society

  6. American Transport Service

  7. Austria—schilling

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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