Source : Webster's Revised Unabridged Dictionary (1913)

Allodium \Al*lo"di*um\, n. [LL. allodium, alodium, alodis,
   alaudis, of Ger. origin; cf. OHG. al all, and ?t (AS. e[=a]d)
   possession, property. It means, therefore, entirely one's
   property.] (Law)
   Freehold estate; land which is the absolute property of the
   owner; real estate held in absolute independence, without
   being subject to any rent, service, or acknowledgment to a
   superior. It is thus opposed to {feud}. --Blackstone.
   --Bouvier.