Source : Webster's Revised Unabridged Dictionary (1913)

Maraud \Ma*raud"\, v. i. [imp. & p. p. {Marauded}; p. pr. & vb.
   n. {Marauding}.] [F. marauder, fr. maraud vagabond, OF.
   marault; of uncertain origin, perh. for malault, fr.
   (assumed) LL. malaldus; fr. L. malus bad, ill + a suffix of
   German origin (cf. {Herald}). Cf. {Malice}.]
   To rove in quest of plunder; to make an excursion for booty;
   to plunder. ``Marauding hosts.'' --Milman.

Maraud \Ma*raud"\, n.
   An excursion for plundering.

Source : WordNet®

maraud
     n : a sudden short attack [syn: {foray}, {raid}]
     v : raid and rove in search of booty; "marauding rebels overran
         the countryside"