Blog, as a term, has multiple definitions. In its most general sense, a blog is simply a website or online journal that is maintained by an individual or group for the purpose of sharing information and ideas with others.
However, the definition can be more specific depending on the context in which it is used.
For example, one definition of a blog may refer to a blog as an online journal that is maintained primarily for the purpose of providing content that is either original or syndicated from other sources. This definition would typically exclude blogs that are primarily used to share links to other websites or articles.
Another definition of a blog may refer to a blog as an online journal that is written and published by an individual or group in order to provide information and commentary on current events and issues. This definition would typically include blogs that are written by professional journalists as well as blogs that are written by individual bloggers who are passionate about a particular topic.
The most general definition of a blog, however, refers to any website or online journal that is maintained by an individual or group for the purpose of sharing information and ideas with others. This includes both professional and amateur bloggers who write about topics that interest them.