How is adjournment indicated in a meeting?

Adjournment in a meeting is indicated by a single rap of the gavel. This action serves as a formal signal to all participants that the meeting has concluded. The use of the gavel in parliamentary procedure is a traditional practice that helps maintain order during meetings. A single rap of the gavel is clear and authoritative, ensuring that everyone present understands that the meeting is officially over.

Other options might seem like they could effectively indicate adjournment as well, but they do not align with the formal procedures typically followed in meetings. For example, a loud announcement could be disruptive, and a series of claps lacks the formality and clarity needed to effectively signal the end of a meeting. Therefore, the single rap of the gavel stands out as the recognized and appropriate method for indicating adjournment in a meeting setting.