Definitions for "Eruv"
a legal fiction which transforms a "public domain" into a "private domain", by enclosing the area inside fences, power lines, etc., so as to allow carrying objects on Shabbat; the area so enclosed.
A consturction of virtual walls that encloses a public place so that it becomes considered a private domain, in which carrying on Shabbat is permitted
a ceremonial demarcation of an area within which Orthodox Jews may engage in certain activities on the Sabbath that would otherwise be prohibited
a system of fences, poles and wires that surround a neighborhood
a social architecture and as such can be considered a form of public art