soc \soc\ so^k, n. as. s=oc the power of holding court,
   sway, domain, properly, the right of investigating or
   seeking; akin to e. sake, seek. sake, seek, and cf.
   sac, and soke. written also sock, and soke.
   1. o. eng. law
      a the lord's power or privilege of holding a court in a
          district, as in manor or lordship; jurisdiction of
          causes, and the limits of that jurisdiction.
      b liberty or privilege of tenants excused from customary
          burdens.
          1913 webster

   2. an exclusive privilege formerly claimed by millers of
      grinding all the corn used within the manor or township
      which the mill stands. eng.
      1913 webster

   soc and sac o. eng. law, the full right of administering
      justice in a manor or lordship.
      1913 webster
see also:
sake seek sac soke sock soke 
soc and sac