1] I would like to know if there is someplace to get a more concrete
answer to the definition of  mirror/spam (as in multiple web sites)

2] for example I host & design web sites so i made a hosting/design
web site  (no geographical region like most web sites)
now.. I also live in a particular city I want to make the same web
site but concentrate more on the city in keywords title etc.
even in redesigning the site the content is the same .. I don't want
to be blacklisted or something for having the same web site on
multiples locations
its intent is different (the first site is meant for the whole country
and some one seeing my city might not want to join)
the reverse being some one in the city looking for hosting will never
find me with out the city key words.. etc..

3]  A lot easier same idea between hosting and a design site..

I want to optimize the web site but I am not trying to get blacklisted
or be sneeky..

A mirror in computing is a direct copy of a data set. On the Internet,
a mirror site is an exact copy of another Internet site (often a web
site). Mirror sites are most commonly used to provide multiple sources
of the same information, and are of particular value as a way of
providing reliable access to large downloads. Mirroring is a one-way
operation whereas file synchronization is two-way.

this can increase a site's ranking in a search engine by placing
hyperlinks from each mirror to every other mirror (a technique known
as link farming). This is viewed as unethical by most search engine
administrators and websurfers.

Spamming is the abuse of any electronic communications medium to send
unsolicited messages in bulk. While its definition usually extends to
any unsolicited bulk electronic communication, some exclude from the
definition of the term "spam" messages considered by the receiver (or
even just the sender) to be targeted, non-commercial, or wanted. In
the popular eye, the most common form of spam is that delivered in
e-mail as a form of commercial advertising. However, over the short
history of electronic media, people have spammed for many purposes
other than the commercial, and in many media other than e-mail.
Spammers have developed a variety of spamming techniques, which vary
by media: e-mail spam, instant messaging spam, Usenet newsgroup spam,
Web search engines spam, weblogs spam, and mobile phone messaging
spam.

From Wikipedia