1. A basic or essential question that is crucial to understanding a subject or resolving a problem
The fundamental question is whether we should invest in renewable energy.
A questão fundamental é se devemos investir em energia renovável.
2. A core issue of great importance in a discussion, debate, or field of study
In philosophy, the fundamental question of consciousness remains unanswered.
Na filosofia, a questão fundamental da consciência continua sem resposta.