William pitt :  n 1: English statesman and son of Pitt the Elder (1759-1806) [syn: Pitt, William Pitt, Second Earl of Chatham, Pitt the Younger] 2: English statesman who brought the Seven Years' War to an end (1708-1778) [syn: Pitt, William Pitt, First Earl of Chatham, Pitt the Elder]