a long and narrow corridor, or place for walking; a connecting passageway, as between one room and another; also, a long hole or passage excavated by a boring or burrowing animal.-a room for the exhibition of works of art; as, a picture gallery; hence, also, a large or important collection of paintings, sculptures, etc.-a long and narrow platform attached to one or more sides of public hall or the interior of a church, and supported by brackets or columns; -- sometimes intended to be occupied by musicians or spectators, sometimes designed merely to increase the capacity of the hall.-a frame, like a balcony, projecting from the stern or quarter of a ship, and hence called stern gallery or quarter gallery, -- seldom found in vessels built since 1850.-any communication which is covered overhead as well as at the sides. when prepared for defense, it is a defensive gallery.-a working drift or level.