Registered - Definition
registered
adj 1: (of animals) officially recorded with or certified by a
recognized breed association; especially in a stud book;
"a registered Percheron" [ant: unregistered]
2: listed or recorded officially; "record is made of `registered
mail' at each point on its route to assure safe delivery";
"registered bonds" [ant: unregistered]
3: (of a boat or vessel) furnished with necessary official
documents specifying ownership etc