1. A business transaction or enterprise that involves multiple components, stakeholders, or intricate procedures
The merger was a complex business that required months of negotiations.
A fusão foi um negócio complexo que exigiu meses de negociações.
2. A difficult or complicated matter involving commercial or financial aspects
International trade involves many complex businesses and regulatory frameworks.
O comércio internacional envolve muitos negócios complexos e marcos regulatórios.