Wordnet 3.0
NOUN (1)
1.
the fourth son of Edward III who was the effective ruler of England during the close of his father's reign and during the minority of Richard II;
his son was Henry Bolingbroke (1340-1399);
[syn: John of Gaunt, Duke of Lancaster]
WordNet (r) 3.0 (2006):
Duke of Lancaster
n 1: the fourth son of Edward III who was the effective ruler of
England during the close of his father's reign and during
the minority of Richard II; his son was Henry Bolingbroke
(1340-1399) [syn: John of Gaunt, Duke of Lancaster]