1. A structured social or professional gathering that follows established rules of conduct, dress code, and etiquette
The wedding was a formal event requiring black-tie attire.
O casamento foi um evento formal que exigia traje de gala.
2. An official or ceremonial occasion with a predetermined agenda and formal proceedings
The company's annual gala is their most important formal event of the year.
A gala anual da empresa é seu evento formal mais importante do ano.