Avada Kedavra Meaning

[hermowninny719]

No: HPFGUIDX 84735

I was meandering through some old intervews this evening, just for 
kicks when I came across the following Q&A from a Carnes & Noble Chat 
on October 20, 2000:

Q: Where do you come up with the words that you use, the names of the 
classes and spells and games, etc.? For example, the Patronus 
Expectumous, was it? 
A:  Expecto Patronum -- you were close! That's Latin. Go and look it 
up -- a little investigation is good for a person! Mostly I invent 
spells, but some of them have particular meanings. Like "avada 
kedavra" -- I bet someone out there knows what that means. 

I know there's someone in the groups that can enlighten me as to the 
meaning of Avada Kedavra.  Also, I'd really like to know where on the 
net I can look up latin meanings.

Thanks
-Hermowninny