Source : Webster's Revised Unabridged Dictionary (1913)

Soc \Soc\ (s[o^]k), n. [AS. s[=o]c 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.

   2. An exclusive privilege formerly claimed by millers of
      grinding all the corn used within the manor or township
      which the mill stands. [Eng.]

   {Soc and sac} (O. Eng. Law), the full right of administering
      justice in a manor or lordship.