a1

A-1

[ey-wuhn]
adjective
Also, A 1.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
A1, A-1 or A-one (ˈeɪˈwʌn)
 
adj
1.  in good health; physically fit
2.  informal first class; excellent
3.  (of a vessel) with hull and equipment in first-class condition
 
A-1, A-1 or A-one
 
adj
 
A-one, A-1 or A-one
 
adj

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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Etymonline
Word Origin & History

A-1
in figurative sense of "first-rate," 1837, in Dickens; from Lloyd's of London designation for ships in first-class condition (with the letter referring to the condition of the ship and the number to that of the stores).
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

a1 definition

language
Address 1 code.
An a1 code interpreter, by Matthew Newhook matthew@engr.mun.ca was used to test compiler output. It requires gcc 2.4.2 or higher and is portable to computers with memory segment protection.
(ftp://ftp.cs.mun.ca/pub/a1).
(1994-07-19)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
A-1
first class (excellent)
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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