Source : Webster's Revised Unabridged Dictionary (1913)

Street \Street\ (str[=e]t), n. [OE. strete, AS. str[=ae]t, fr.
   L. strata (sc. via) a paved way, properly fem. p. p. of
   sternere, stratum, to spread; akin to E. strew. See {Strew},
   and cf. {Stratum}, {Stray}, v. & a.]
   Originally, a paved way or road; a public highway; now
   commonly, a thoroughfare in a city or village, bordered by
   dwellings or business houses.

         He removed [the body of] Amasa from the street unto the
         field.                                   --Coverdale.

         At home or through the high street passing. --Milton.

   Note: In an extended sense, street designates besides the
         roadway, the walks, houses, shops, etc., which border
         the thoroughfare.

               His deserted mansion in Duke Street. --Macaulay.

   {The street} (Broker's Cant), that thoroughfare of a city
      where the leading bankers and brokers do business; also,
      figuratively, those who do business there; as, the street
      would not take the bonds.

   {Street Arab}, {Street broker}, etc. See under {Arab},
      {Broker}, etc.

   {Street door}, a door which opens upon a street, or is
      nearest the street.

   Syn: See {Way}.

Arab \Ar"ab\ (?; 277), n. [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. ?.]
   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.

Source : WordNet®

street arab
     n : a homeless child who has been abandoned and roams the
         streets [syn: {gamin}, {throwaway}]