Source : Webster's Revised Unabridged Dictionary (1913)

Impark \Im*park"\, v. t. [imp. & p. p. {Imparked}, p. pr. & vb.
   n. {Imparking}.] [Cf. {Empark}.]
   To inclose for a park; to sever from a common; hence, to
   inclose or shut up.

         They . . . impark them [the sheep] within hurdles.
                                                  --Holland.