1. A formal ceremony or celebration marking the start or inauguration of something new, such as a business, venue, festival, or public facility
The opening event of the new museum attracted thousands of visitors.
O evento de abertura do novo museu atraiu milhares de visitantes.
2. The first scheduled event in a series, competition, or program
The opening event of the Olympic Games is the torch lighting ceremony.
O evento de abertura dos Jogos Olímpicos é a cerimônia de acendimento da tocha.