The Collaborative International Dictionary of English v.0.48:

Dispark \Dis*park"\, v. t.
   1. To throw (a park or inclosure); to treat (a private park)
      as a common.
      [1913 Webster]

            The Gentiles were made to be God's people when the
            Jews' inclosure was disparked.        --Jer. Taylor.
      [1913 Webster]

   2. To set at large; to release from inclosure.
      [1913 Webster]

            Till his free muse threw down the pale,
            And did at once dispark them all.     --Waller.
      [1913 Webster]