General Definition:
1. Something which is long, straight and relatively thin or narrow, such as a path, skid marks, handrail, or even airport runway (as seen from a great height), or any thing or any action directly or indirectly associated with this, especially a path.
As a Noun:
1. The space by the side of a city street for people to walk on. Australian English = footpath, path. British English = pavement. American English = sidewalk.
2. A long, narrow space for people to walk on that has been covered or prepared in some way. English = path, pathway.