microblog noun 1verb 1forms 3 noun1 •(Internet) A blog on which one posts brief, frequent updates on one's activities.For Dorsey, creating this community of linked microblogs has been "endearing, because you know what everyone you know is doing" […] — 2006 verb1 •(Internet) To post on a microblog.I started microblogging last week. formsmicroblogged · microblogging · microblogs