[n] (mining) a horizontal (or nearly horizontal) passageway in a mine; "they dug a drift parallel with the vein"
[n] narrow recessed balcony area along an upper floor on the interior of a building; usually marked by a colonnade
[n] a covered corridor (especially one extending along the wall of a building and supported with arches or columns)
[n] a long usually narrow room used for some specific purpose; "shooting gallery"
[n] a room or series of rooms where works of art are exhibited
[n] a porch along the outside of a building (sometimes partly enclosed)
[n] spectators at a golf or tennis match