Open English Wordnet
Adjectives
(a)registered(of animals) officially recorded with or certified by a recognized breed association; especially in a stud book“a registered Percheron”
(a)registeredlisted or recorded officially“record is made of `registered mail' at each point on its route to assure safe delivery”, “registered bonds”
(s)registered(of a boat or vessel) furnished with necessary official documents specifying ownership etc