1. A situation, problem, or matter that is intricate, difficult to understand, or requires careful analysis due to multiple interconnected factors
This legal case is very complex due to the involvement of multiple jurisdictions.
Este caso complexo envolve múltiplas jurisdições e requer análise cuidadosa.
2. In medical or professional contexts, a patient or situation presenting multiple complications or challenging aspects
The doctor referred the patient to a specialist because it was a complex case.
O médico encaminhou o paciente a um especialista porque era um caso complexo.