1. Significant or essential pieces of information or facts that are crucial to understanding, completing, or making decisions about something
The contract contains many important details that need to be reviewed carefully.
O contrato contém muitos detalhes importantes que precisam ser analisados cuidadosamente.
2. Specific aspects or elements that warrant attention or consideration because they have substantial impact or relevance
Pay attention to the important details in the instructions.
Preste atenção aos detalhes importantes nas instruções.