1. A serious and important discussion or argument about a significant issue, typically involving careful consideration of different viewpoints
The parliament held a grave debate about climate change legislation.
O parlamento realizou um debate grave sobre a legislação de mudanças climáticas.
2. A formal discussion of a weighty or consequential matter that carries substantial implications
There was a grave debate among economists regarding the new economic policy.
Houve um debate grave entre economistas sobre a nova política econômica.