Wordnet 3.0
NOUN (1)
1.
King of England from 1483 to 1485;
seized the throne from his nephew Edward V who was confined to the Tower of London and murdered;
his reign ended when he was defeated by Henry Tudor (later Henry VII) at the battle of Bosworth Field (1452-1485);
WordNet (r) 3.0 (2006):
Richard III
n 1: King of England from 1483 to 1485; seized the throne from
his nephew Edward V who was confined to the Tower of London
and murdered; his reign ended when he was defeated by Henry
Tudor (later Henry VII) at the battle of Bosworth Field
(1452-1485)