1. The main or most important question or issue at the heart of a discussion, problem, or debate
The central question in this debate is whether we should invest more in education.
A questão central neste debate é se devemos investir mais em educação.
2. The core issue that needs to be addressed or resolved
The central question remains: how can we reduce poverty?
A questão central permanece: como podemos reduzir a pobreza?