Definition of "successor"

successor

/səkˈsɛsə/

noun
plural successors
1. A person or thing that immediately follows another in holding an office or title.
  Quotations
  As Di Matteo celebrated and captain John Terry raised the trophy for the fourth time, the Italian increased his claims to become the permanent successor to Andre Villas-Boas by landing a trophy.
  2012 May 5, Phil McNulty, “Chelsea 2-1 Liverpool”, in BBC Sport‎
2. The next heir in order or succession.
3. A person who inherits a title or office.
4. (arithmetic, set theory) The integer, ordinal number or cardinal number immediately following another.