1. A package or parcel whose contents, origin, or destination are not identified or unclear
The delivery company refused to handle the unknown package without proper documentation.
A empresa de entrega recusou-se a manusear o pacote desconhecido sem documentação adequada.
2. In computing, a software package or library that is not recognized or identified by the system
The system flagged an unknown package during the installation process.
O sistema sinalizou um pacote desconhecido durante o processo de instalação.
3. A mysterious or suspicious parcel, often used in security contexts
Police investigated the unknown package left at the station.
A polícia investigou o pacote desconhecido deixado na estação.