What is a blog(definition)

 Generally speaking, it's an online journal comprised of links and postings in reverse chronological order, meaning the most recent posting appears at the top of the page. As Meg Hourihan, co-founder of Pyra Labs, the blogging software company acquired by Google in February 2003, has noted, weblogs are ¡°post-centric¡± -- the posting is the key unit -- rather than ¡°page-centric,¡± as with more traditional websites. Weblogs typically link to other websites and blog postings, and many allow readers to comment on the original post, thereby allowing audience discussions.