e/Pet fence

Information
has gloss	eng: A pet fence or fenceless boundary is a wire around the perimeter of a home, designed to keep a pet within the boundaries of the property without the use of a physical barrier. The wire (which may be buried) carries a radio signal, while the pet wears a lightweight receiver collar which emits a warning sound when the pet nears the boundary. If the warning is ignored and the pet crosses beyond the boundary of the fence, the pet receives a mild electric shock. The pet soon learns to avoid the invisible fence location, making it an effective virtual barrier. Animals (including humans) not wearing the collar are unaffected by the underground wire. Although called "fences", these fenceless boundary systems are more accurately termed electronic pet containment systems. In cost analysis they have shown to be much cheaper and more aesthetically pleasing than physical fences. Pet fences are known by a variety of trade names, including Hidden Fence, Invisible Fence and Contain-A-Pet.
lexicalization	eng: pet fence
instance of	(noun) a barrier that serves to enclose an area fencing, fence