Porte-co·chère n. Arch. A large doorway allowing vehicles to drive into or through a building. It is common to have the entrance door open upon the passage of the porte-cochère. Also, a porch over a driveway before an entrance door.
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porte-cochere
n 1: a carriage entrance passing through a building to an
enclosed courtyard
2: canopy extending out from a building entrance to shelter
those getting in and out of vehicles