Read the dictionary definition of registered. All definitions for this word.
1. (of a boat or vessel) furnished with necessary official documents specifying ownership etc
2. listed or recorded officially
1. record is made of `registered mail' at each point on its route to assure safe delivery
2. registered bonds
3. (of animals) officially recorded with or certified by a recognized breed association; especially in a stud book
1. a registered Percheron