Seat in public transport, such as a plane, train or bus, that's beside the aisle.
Any path through an otherwise obstructed space.
A clear corridor in a supermarket with shelves on both sides containing goods for sale.
A wing of a building, notably in a church separated from the nave proper by piers.
The path of a wedding procession in a church or other venue; (by extension, metonymically) marriage.
An idiomatic divide between the Republican Party and the Democratic Party, who are said to be on two sides of the aisle.
A clear path through rows of seating.
An elevated corridor connecting an airport to a plane, usually enclosed and used for disembarking and embarking passengers and crew.