right of reentry

Noun

 * 1)  Where a grantor has created a fee simple subject to condition subsequent, and the condition of the grant has come to pass, the right of the grantor to physically reclaim ownership of the land.
 * 2)  The right of a person who has traveled out of their country of citizenship to cross the border upon return to that country.

Synonyms
right of the grantor to physically reclaim ownership of land