1. A specific area or region with distinct and unambiguous boundaries or characteristics that are easy to understand and identify
The airport has a clearly defined zone for international arrivals.
O aeroporto tem uma zona claramente definida para chegadas internacionais.
2. In administrative or legal contexts, a territory with explicit demarcation and established rules or regulations
The parking lot is divided into a clearly defined zone for handicapped access.
O estacionamento é dividido em uma zona claramente definida para acesso de pessoas com deficiência.