Source : Webster's Revised Unabridged Dictionary (1913)

Wanderer \Wan"der*er\, n.
   One who wanders; a rambler; one who roves; hence, one who
   deviates from duty.

Source : WordNet®

wanderer
     n 1: someone who leads a wandering unsettled life [syn: {roamer},
           {rover}, {bird of passage}]
     2: a computer program that prowls the internet looking for
        publicly accessible resources that can be added to a
        database; the database can then be searched with a search
        engine [syn: {spider}]