The Collaborative International Dictionary of English v.0.48:

Maroon \Ma*roon"\, v. t. [imp. & p. p. Marooned; p. pr. & vb.
   n. Marooning.] [See Maroon a fugitive slave.]
   To put (a person) ashore on a desolate island or coast and
   leave him to his fate.
   [1913 Webster]

   Marooning party, a social excursion party that sojourns
      several days on the shore or in some retired place; a
      prolonged picnic. [Southern U. S.] --Bartlett.
      [1913 Webster]