A formal talk is a type of communication that is usually prepared and delivered in a structured manner. An ORATION is a formal talk that is usually delivered in a public setting, such as a graduation ceremony or political rally. A SPEECH is a formal talk that is typically given to an audience in order to inform, persuade, or entertain. A LECTURE is a formal talk that is usually given by an expert on a particular subject to an audience of students or other interested parties. An ADDRESS is a formal talk that is usually given to a specific group of people, such as a business meeting or a wedding.