- Legal possession of land, as a freehold estate.
- a. The act or an instance of taking legal possession of land.b. Property thus possessed.
Origin of seisinMiddle English seisine, from Old French saisine, from seisir, to seize; see seize.
seisin - Legal Definition
Ownership of land; used in early British law, because ownership of the land belonged to the sovereign. It referred to the person in possession of a freehold estate. See also covenant.