What term describes a formal talk given to a group of people?

The term that best describes a formal talk given to a group of people is a presentation. A presentation typically involves a speaker delivering information, ideas, or arguments on a particular topic, often supported by visual aids such as slides or charts. This format is designed to convey specific messages and engage the audience in a structured way.

Comparatively, a discussion usually implies an exchange of ideas among participants where multiple opinions might be shared, rather than a single person's formal delivery of information. Dialogue suggests a two-way conversation that may not be formal and is more about conversation and interaction rather than structured presentation. A seminar, while it can involve presentations, often encompasses a broader setting that includes workshops or discussions and may involve various speakers or activities, making it less focused on the singular, formal aspect of a talk.