gallery in WordNet English dictionary

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