noun
or sei·zin ˈsēz ə n
( -s )
Etymology: Middle English seisine, sesin, from Old French saisine, from saisir to seize — more at seize
1. : the possession of land or chattels : possession with quiet enjoyment
take seisin of the land
2. : the possession of or status with relation to land arising from the completion of feudal investiture by livery of seisin
3. : the possession of a freehold estate in land by one having title thereto