fee simple subject to condition subsequent English

Meaning fee simple subject to condition subsequent meaning

What does fee simple subject to condition subsequent mean?

fee simple subject to condition subsequent noun

— (legal) A defeasible fee created with language reserving the right of the grantor to reclaim ownership of the land upon the occurrence of a specified condition (e.g. "if X event occurs, grantor reserves the right to reenter and retake"); upon occurrence of the condition, the grantor may decide to retake ownership or not.