Definify.com
Webster 1913 Edition
Arab
Ar′ab
(?; 277)
, Noun.
 [Prob. ultimately fr. Heb. 
arabah 
a desert, the name employed, in the Old Testament, to denote the valley of the Jordan and Dead Sea. Ar. Arab
, Heb. arabi
, arbi
, arbim
: cf. F. Arabe
, L. Arabs
, Gr. [GREEK].] One of a swarthy race occupying Arabia, and numerous in Syria, Northern Africa, etc. 
Street Arab
, a homeless vagabond in the streets of a city, particularly and outcast boy or girl. 
Tylor.
The ragged outcasts and 
street Arabs 
who are shivering in damp doorways. Lond. Sat. Rev.