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A1

 [ey-wuhn]   Origin

A-1

   [ey-wuhn]
adjective
A one.
Also, A 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To A1

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A1 is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a stew of meat, vegetables, potatoes, etc.
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
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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Slang Dictionary

A-1 definition


and A number 1
  1. mod.
    of the highest rating. : This steak is really A-1!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
Cite This Source
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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