1 : the return of title to property to its former or true owner; specifically, in the civil law of Louisiana : the return to a decedent’s heirs of property of the decedent that had been sold or assigned by coheirs

Note: An heir’s right to retrocession has been repealed.
2 : the act of ceding back something (as jurisdiction)
3 a : the process by which all or part of the risks assumed in an insurance contract are reassigned or ceded by a reinsurer to another insurance company
b : the amount reassigned or ceded