The Collaborative International Dictionary of English v.0.48:

Police \Po*lice"\, v. t. [imp. & p. p. Policed; p. pr. & vb.
   n. Policing.]
   1. To keep in order by police.
      [1913 Webster]

   2. (Mil.) To make clean; as, to police a camp.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Policed \Po*liced"\, a.
   Regulated by laws for the maintenance of peace and order,
   enforced by organized administration. "A policed kingdom."
   --Howell.
   [1913 Webster]