1. A formal event that marks the official beginning or inauguration of something, such as a sporting event, festival, or building
The opening ceremony of the Olympics featured spectacular performances and cultural displays.
A cerimônia de abertura das Olimpíadas apresentou apresentações espetaculares e exibições culturais.
2. A ceremonial event held at the start of a conference, competition, or public event
The opening ceremony included speeches from dignitaries and the lighting of the torch.
A cerimônia de abertura incluiu discursos de dignitários e o acendimento da tocha.