A

1) Indefinite article, see also the.
2) Random addition in a sentence, usually after I'm but before a verb
1) "Hey, a cat."
2) I'm a going to town
by Murgie May 13, 2005
mugGet the Amug.

713

In addition to the definitions above, in Harry Potter and the philosopher's Stone the Stone was taken by Hagrid from vault no. 713.
"I'm halfway through the book, I really want to know what was in vault 713!"
"You're a freak. Nerd."
by Murgie May 13, 2005
mugGet the 713mug.