Shur
an enclosure; a wall, a part, probably, of the Arabian desert,
on the north-eastern border of Egypt, giving its name to a
wilderness extending from Egypt toward Philistia (Gen. 16:7;
20:1; 25:18; Ex.15:22). The name was probably given to it from
the wall (or shur) which the Egyptians built to defend their
frontier on the north-east from the desert tribes. This wall or
line of fortifications extended from Pelusium to Heliopolis.