- Blog，是Weblog的简称。 - Weblog，是Web 和Log的组合词。Web，指World Wide Web；Log，原义是“航海日志”，后指任何类型的流水性记录。Weblog 是在网络上的一种流水记录形式。 - Blogger或Weblogger，是指习惯于日常记录并使用Weblog工具的人。

* 摘自中文Blog心得集：

"BLOG之于知识，就如Linux之于软件，Napster之于音乐。"

WikiPedia的解释：

Web log : http://www.wikipedia.org/wiki/Web_log  

A web log (also known as a blog, see below) is a website that tracks headlines and articles from other websites. They are frequently maintained by volunteers and are typically devoted to a specific audience or topic.

Weblogs are often-updated sites that point to articles elsewhere on the web, often with comments, and to on-site articles. A weblog is kind of a continual tour, with a human guide who you get to know. There are many guides to choose from, each develops an audience, and there's also comraderie and politics between the people who run weblogs, they point to each other, in all kinds of structures, graphs, loops, etc. -- Dave Winer, [1]

Web logs are useful for web-surfers because they often collect numerous web sites with interesting content in an easy to use and constantly updated format.

The format of web logs varies, from simple bullet lists of hyperlinks, to article summaries with user-provided comments and ratings.

The totality of web logs and blog-related webs is called blogosphere.

Since their introduction, a number of software packages have appeared to allow people to create their own web log.

*摘自：Wikipedia（全球最大的开放百科全书）: http://www.wikipedia.org/wiki/Weblog

Corante的解释：

Blogs = Instant publishing

Blogs are instant publishing. You write, you cut-and-paste images, you cut-and-paste links, you customize everything through a WYSIWIG interface, and with one click you publish. There is no Webmaster. There is no gatekeeper (necessarily). There's just you, your PC, your Internet connection, and a form. Think of HTML as a language for creating Web pages. Blogging is simply a Graphical User Interface that makes creating "content" as easy as -- writing. (And with audioblogging or videoblogging or blogs that just consist of pictures, photos, or other images -- it doesn't even have to be writing.) The implications of this are as profound as the implications of the Web itself. They are not limited to journalism. That is its public face, because blogging software is such a great tool for journalists. A lot more publications -- not just National Review and The Nation, are going to switch to a blogging format over the next year, because it saves a ton of money. But that is the tip of the iceberg. Blogging is going to be a great education tool. Blogging is the perfect groupware tool. Blogging really is Personal Publishing, the promise of HTML fulfilled.

摘自：http://www.corante.com/mooreslore/20030501.shtml#33552

其他解释：

What Makes A Weblog A Weblog, Dave Winner, 2003/6
What Is A Weblog?, Russ Lipton, June 11, 2002

Blog, 又称部落格(台湾地区译名)或博客(中国大陆译名)

Blog一字本起源于 weblog（web-log，意思“网上日志”），后简称blog。这是1997年 Jorn Barger所提出来的定义，根据Rebecca的文章 (http://www.rebeccablood.net/essays/weblog_history.html)，在1998年infosift 的编辑，将一些类似blog的网站收集起来，寄给Cameron Barret。然后 Cameron 将名单发布在Cambworld (http://camworld.com/)上，许多人相继将blog的url给Cameron，慢慢的一个新的网络社区俨然成型。1999年Brigitte Eaton成立一个weblog目录，收集她所知道的blog站。但是 blog 真正开始快速发展，是在1999年6月当pitas开始提供免费的weblog服务，紧接着8月，pyra lab推出了现在的blogger.com。blogger.com 提供简单上手的说明，及能够透过FTP直接将blog发表在个人网站上的功能，带给使用者很大的方便。