Source : Webster's Revised Unabridged Dictionary (1913)

Marauder \Ma*raud`er\, n. [From {Maraud}, v.: cf. F. maraudeur.]
   A rover in quest of booty or plunder; a plunderer; one who
   pillages. --De Quincey.

Source : WordNet®

marauder
     n : someone who attacks in search of booty [syn: {predator}, {vulture},
          {piranha}]