1. A fundamental assumption or proposition that serves as the foundation for a theory, argument, or belief
The basic premise of the theory is that all humans are equal.
A premissa básica da teoria é que todos os seres humanos são iguais.
2. A primary or essential starting point for reasoning or discussion
The basic premise of the project was to reduce costs by 20%.
A premissa básica do projeto era reduzir custos em 20%.