1. A crucial or fundamental piece of information or element that is necessary for understanding, completing, or executing something
The essential details of the contract must be reviewed before signing.
Os detalhes essenciais do contrato devem ser revisados antes da assinatura.
2. A key or vital aspect that cannot be omitted without affecting the overall outcome or success
We cannot overlook the essential details when planning the project.
Não podemos negligenciar os detalhes essenciais ao planejar o projeto.