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a (1)
a [ ay ] (plural a's) or A (plural A's or As)


noun 
Definition:
 
1. 1st letter of English alphabet: the first letter of the English alphabet, representing a vowel sound
2. letter 'a' written: a written representation of the letter 'a'
Encarta® World English Dictionary [World English Edition] © & (P)2008 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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