Blogging

This age of the earth is called blogging age because of the internet's popularity this is gaining importance. So what is blogging???? This is the question of the century. When referred in the English dictionaries there is no such word called "blog". So what does it implies? is it means updating the knowledge or giving information or providing news or anything other than that. First i like you all comment about the term blog, i want to know what you feel about this word. When you hear or read the word blog what does it implies to you?
i m expecting your comments and after getting your views i shall give you more informations on this term......................