What is Right Of Way?

Legal Definition
Right of way is a term used to describe "the legal right, established by usage or grant, to pass along a specific route through grounds or property belonging to another", or "a path or thoroughfare subject to such a right". A similar right of access also exists on some public land in the United States and Canada, as well as Australia and New Zealand (where such land may alternatively be called Crown land).

In some countries, especially in Northern Europe, where the freedom to roam has historically taken the form of general public rights, a right of way may not be restricted to specific paths or trails. Alternatively, the right of way may be limited. When one person owns a piece of land which is bordered on all sides by lands owned by others, a court will be obliged to grant that person a right of way through the bordering land.
-- Wikipedia
Legal Definition
The right of passage or of way is a servitude imposed by law or by convention, and by virtue of which one has a right to pass on foot or horseback or in a vehicle, to drive beasts of burden on carts, through the estate of another. When this servitude results from the law, the exercise of it is confined to the wants of the person who has it. When it is the resuit of a contract, its extent and the mode of using it is regulated by the contract. Civ. Gods La. art 722. "Right of way," in its strict meaning, is the right of passage over another man's ground; and in its legal and generally accepted meaning; in reference to a railway, it is a mere easement in the lands of others, obtnined by lawful condemnation to public use or by purchase. It would be using the term in an unusual sense, by applying it to an absolute purchase of the fee-simple of lands to be used for a railway oi any other kind of a way. Williams v. Western Union Rv. Co... 50 Wis. 76, 5 N. W. 482. And see Knpp v. Curtis, 71 Cal. 62, 11 Pac. 879; Johnson v. Lewis, 47 Ark. 66, 2 S. W. 329; Bodfish v. Bodfish, 105 Mass. 317 ; New Mexico v. United States Trust Co.., 172 U. S. 171, 19 Sup. Ct. l28, 43 L. Ed. 407; Stuyvesant v. Woodruff, 21 N. J. Law, 136, 57 Am. Dee, 156.
-- Black's Law Dictionary
Legal Definition
The right or easement of passing over the land of another. See 2 McCord (S. C.), 445, 13 Am. Dec. 741.
-- Ballentine's Law Dictionary