Definition: a blog (a portmanteau of web log) is a website where entries are written in chronological order and commonly displayed in reverse chronological order. Many blogs provide commentary or news on a particular subject; others function as more personal online diaries. A typical blog combines text, images, and links to other blogs, web pages, and other media related to its topic. The ability for readers to leave comments in an interactive format is an important part of many blogs.
(Source: Wikipedia)