Eruv

An eruv (pronounced: AY'roov) (Hebrew: עירוב‎ mixture, also transliterated as eiruv or erub, plural: eruvin (pronounced: AY'roo'VEEN) is a ritual enclosure that some communities construct in their neighborhoods as a way to permit Jewish residents or visitors to transfer objects from one domain type to another, such as carrying an object from indoors (a private domain) to a public street (a public domain) on Shabbat, which they would otherwise understand to be prohibited by Jewish law (Halakha). An eruv accomplishes this by integrating a number of private and public properties into one larger private domain.