Aisle

[Sonia]

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.

[Luis Fok]

a passage between rows of seats in a building such as a church or theater, an airplane, or a train.

[Michiko]

a long, narrow space between rows of seats in an aircraft, cinema, or church: