Source : Webster's Revised Unabridged Dictionary (1913)

Streetwalker \Street"walk`er\, n.
   A common prostitute who walks the streets to find customers.

Source : WordNet®

streetwalker
     n : a prostitute who attracts customers by walking the streets
         [syn: {street girl}, {hooker}, {hustler}, {floozy}, {floozie},
          {slattern}]