Definition of fee simple interest in English English dictionary
(Kanun) The absolute, legal possession and ownership of land, property, or rights, including mineral rights. A fee interest can be sold (in its entirety or in part) or passed on to heirs or successors
A defeasible fee created with clear durational language expressing a condition (e.g. "so long as", "until", "while") which causes ownership of a property to revest in a third party identified by the grantor if that condition comes about