1. The primary concern, focus, or area of importance for a person or organization
His principal interest is in sustainable energy development.
Seu interesse principal é no desenvolvimento de energia sustentável.
2. In finance, the main concern regarding investment returns or financial matters
The bank's principal interest lies in maximizing shareholder value.
O interesse principal do banco está em maximizar o valor dos acionistas.
3. A primary stake or vested interest in a matter or decision
Both parties have a principal interest in reaching an agreement.
Ambas as partes têm um interesse principal em chegar a um acordo.