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.
A slot available for allocation to a railway train over a given route in between other trains.
Pathology.
A method or direction of proceeding.
A sequence of vertices from one vertex to another using the arcs (edges). A path does not visit the same vertex more than once (unless it is a closed path, where only the first and the last vertex are the same).
A metaphorical course or route; progress.
A trail for the use of, or worn by, pedestrians.
A continuous map f from the unit interval I=[0,1] to a topological space X.
A course taken.
A Pagan tradition, for example witchcraft, Wicca, druidism, Heathenry.
A human-readable specification for a location within a hierarchical or tree-like structure, such as a file system or as part of a URL.
To navigate through a file system directory tree (to a desired file or folder).
To make a path in, or on (something), or for (someone).