Other forms: perorated; perorating; perorates
To perorate is to give a long, pompous speech. If you were expecting your teacher's remarks at the beginning of class to be a quick announcement, your heart will sink when he begins to perorate.
There are two ways to use this somewhat old-fashioned word. The first is as a near-synonym of "orate," although to perorate is to give an even more flowery, pretentious speech than a mere oration. If you perorate when it's your turn to comment at a town meeting, it's unlikely you'll be taken seriously. An older meaning of perorate is to end a long speech with a summary of your main points.