aisle

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A part of a church divided laterally from the nave, transept, or choir by a row of columns.
• noun A passageway between rows of seats, as in an auditorium or an airplane.
• noun A passageway for inside traffic, as in a department store, warehouse, or supermarket.

from The Century Dictionary.

• In heraldry, winged or having wings.
• noun Properly, a lateral subdivision of a church, parallel to the nave, choir, or transept, from which it is divided by piers or columns, and often surmounted by a gallery.

from the GNU version of the Collaborative International Dictionary of English.

• noun A lateral division of a building, separated from the middle part, called the nave, by a row of columns or piers, which support the roof or an upper wall containing windows, called the clearstory wall.
• noun Improperly used also for the have; -- as in the phrases, a church with three aisles, the middle aisle.
• noun Also (perhaps from confusion with alley), a passage into which the pews of a church open.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A wing of a building, notably in a church separated from the nave proper by piers.
• noun A clear path through rows of seating.
• noun A clear corridor in a supermarket with shelves on both sides containing goods for sale.
• noun Any path through an otherwise obstructed space.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun passageway between seating areas as in an auditorium or passenger vehicle or between areas of shelves of goods as in stores
• noun a long narrow passage (as in a cave or woods)
• noun part of a church divided laterally from the nave proper by rows of pillars or columns