Meaning: personal websites and blogs collectively.

 

‘A glimpse into the blogosphere anno 2008 reveals that blogging has become a mainstream genre of computer–mediated communication. While yielding different results, studies estimating the size of the blogosphere agree that the number of weblogs is well beyond one hundred million, and readership is even higher (see Technorati, 2008). Technorati’s annual survey of the blogosphere further shows that the blogosphere is highly diversified, e.g., in terms of weblog content and user motivations for engaging with weblogs.” – firstmonday.org