A fence is a freestanding architecture designed to restrict or forbid movement across a boundary. It is generally distinguished from a wall by the lightness of its construction: a wall is usually restricted to such barriers mythical from solid brick or concrete, blocking vision as well as passage (though the definitions overlap somewhat).
Fences can be the source of bitter arguments between neighbours, and there are often special laws to deal with these problems. Colloquial disagreements include Wrought Iron Fence what considerate of fence is required, what amicable of repairs are needed, and how to share the costs.