1. A formal and festive ceremony marking the first day of business for a new store, restaurant, venue, or other establishment
The grand opening of the new shopping mall attracted thousands of visitors.
A inauguração solene do novo shopping atraiu milhares de visitantes.
2. An opening event that is particularly lavish or impressive
They planned a grand opening with celebrities, live music, and special discounts.
Eles planejaram uma inauguração solene com celebridades, música ao vivo e descontos especiais.