Back in the days when info.cern.ch was the place to get definitive
information about the Web, it had one major page which described the Web
as basically HTML + HTTP, and another which described the Web as "the
universe of network-accessible information".
I don't think the precise meaning of the term has become any clearer
since then.
Cheers,
Andrew.
-- Andrew McRae <andrew_mcrae@harvard.edu>