1. Professional or official relationships characterized by adherence to established protocols, etiquette, and professional boundaries
In business, it's important to maintain formal relationships with colleagues.
Nos negócios, é importante manter relacionamentos formais com os colegas.
2. Romantic partnerships or courtships that follow traditional conventions and social norms
Their formal relationship was announced to both families.
O relacionamento formal deles foi anunciado para ambas as famílias.
3. Official or documented associations between individuals, organizations, or entities
The two countries established formal relationships through a treaty.
Os dois países estabeleceram relacionamentos formais através de um tratado.