1. An area or region with few restrictions on trade, movement, or activity; a free trade area
The open zone between the two countries allows goods to pass without tariffs.
A zona aberta entre os dois países permite que as mercadorias passem sem tarifas.
2. In sports, an undefended or unrestricted area of the playing field
The quarterback found a receiver in the open zone.
O quarterback encontrou um receptor na zona aberta.
3. A geographic area designated for unrestricted commercial or industrial development
The government established an open zone to attract foreign investment.
O governo estabeleceu uma zona aberta para atrair investimento estrangeiro.