Eminent domain, land acquisition, compulsory purchase, resumption, resumption/compulsory acquisition, or expropriation is the power to take private property for public use. It does not include the power to take and transfer ownership of private property from one property owner to another private property owner without a valid public purpose. This power can be legislatively delegated by the state to municipalities, government subdivisions, or even to private persons or corporations, when they are authorized to exercise the functions of public character.
Espropria, "expropriate", protest graffiti in Turin
An easement is a nonpossessory right to use and/or enter onto the real property of another without possessing it. It is "best typified in the right of way which one landowner, A, may enjoy over the land of another, B". An easement is a property right and type of incorporeal property in itself at common law in most jurisdictions.
A metal plaque on the sidewalk of New York City to declare that the crossing onto the private property is a revocable license to protect it from becoming an easement by prescription