1. A social gathering characterized by strict adherence to etiquette, dress codes, and ceremonial protocols
The ambassador hosted a formal party to celebrate the diplomatic agreement.
O embaixador ofereceu uma festa formal para celebrar o acordo diplomático.
2. An elegant evening event requiring formal attire such as tuxedos and evening gowns
She bought a new gown for the formal party at the country club.
Ela comprou um novo vestido para a festa formal no clube de campo.