1. Borders or boundaries that are clearly defined, delineated, or physically marked with visible demarcation lines, signs, or fortifications
The country has well-marked borders with its neighbors.
O país possui fronteiras marcadas bem definidas com seus vizinhos.
2. Clear, established limits or boundaries in abstract contexts, such as in relationships, responsibilities, or territorial divisions
In the agreement, fronteiras marcadas were established between the two companies' territories.
No acordo, fronteiras marcadas foram estabelecidas entre os territórios das duas empresas.