1. A road or path that is not the primary or main route; an alternative route used when the main road is congested, closed, or unavailable
We took a secondary route to avoid traffic on the highway.
Pegamos uma rota secundária para evitar o trânsito na rodovia.
2. In navigation and transportation planning, a road designated as subordinate to major routes
The GPS suggested a secondary route through the city streets.
O GPS sugeriu uma rota secundária pelas ruas da cidade.