1. A secondary or additional way to enter a building, facility, or area, used as an alternative to the main entrance
If the front door is blocked, you can use the alternate entrance at the back of the building.
Se a porta frontal estiver bloqueada, você pode usar a entrada alternativa na parte traseira do edifício.
2. An entrance designated for use when the primary entrance is unavailable, closed, or congested
During the emergency, all visitors were directed to the alternate entrance.
Durante a emergência, todos os visitantes foram direcionados para a entrada alternativa.