1. A postal service that delivers mail and packages faster than regular mail, typically with guaranteed delivery times
I sent the documents by express mail to ensure they arrived on time.
Enviei os documentos por correio expresso para garantir que chegassem a tempo.
2. The service or system that handles expedited mail delivery
The express mail service offers tracking and insurance options.
O serviço de correio expresso oferece opções de rastreamento e seguro.