vlog Syllabification: (vlog)Pronunciation: /vläg/Definition of vlog noun a blog in which the postings are primarily in video form: you can add travel vlogs to the growing list of travel-related material popping up on the WebDerivatives vlogger noun vlogging noun Origin: early 21st century: blend of video and blogvlog in other Oxford dictionaries Definition of vlog in the British & World English dictionary