1. A designated area that is formally recognized and regulated by an authority or organization
The official zone for the event has been clearly marked on the map.
A zona oficial do evento foi claramente marcada no mapa.
2. In sports, a specific area of play that is sanctioned and governed by official rules
The ball landed outside the official zone, so the play was disallowed.
A bola caiu fora da zona oficial, então o lance foi anulado.
3. In customs or trade, an area designated for official processing and regulation
Goods must be declared when entering the official zone at the port.
As mercadorias devem ser declaradas ao entrar na zona oficial do porto.