Wizarding World Terminology

[psychic_serpent]

I'm supposed to be coding the Dursley family FAQ, but it seems to me 
that there is a problem here.  There is a question asked in this 
file which is not answered:

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Is Petunia a Squib or a Witch? It is quite clear from the outburst 
in PS that Petunia feels very angry about the wizarding world. This 
has led some members of the group to put forward the conjecture that 
she is either a squib or a witch hiding her powers. Is she upset 
that Lily was the better at magic and got a place at Hogwarts when 
she did not? 

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There is a mention further along of a theory about Lily, Petunia and 
Narcissa being related, and group messages related to this theory, 
but inasmuch as the definition of a Squib is someone born into a 
magical family, which it seems (we could link to debates about that, 
perhaps) Lily and Petunia were not, it seems that this would have 
been a useful place to put a link to a post discussing something 
along the lines of "What is a Squib?"  Barring that, a link to a 
section of the FAQ containing Wizarding World Terminology (Squib, 
Muggle, Mudblood, Portkey, monetary terms, splinched, Floo, etc.) 
would have been useful, with passages from the books cited for the 
definitions.  However, I was unable to find such a listing in the 
FAQ.  There doesn't seem to be an existing section dedicated to such 
terminology and no plans for creating a glossary of this sort.  Can 
someone enlighten me about this wee gap in the FAQ?

--Barb