1. The most important or distinctive characteristic or quality of a person, thing, or concept
Reliability is the main attribute of a good manager.
A confiabilidade é o atributo principal de um bom gerente.
2. In computing and databases, a key property or characteristic assigned to an entity or object
The main attribute of this database field is that it must be unique.
O atributo principal deste campo de banco de dados é que deve ser único.