William Pitt wil·liam·pitt uncommon noun 1. English statesman and son of Pitt the Elder (1759-1806) SynonymsPittWilliam PittSecond Earl of ChathamPitt the Younger 2. English statesman who brought the Seven Years'' War to an end (1708-1778) SynonymsPittWilliam PittFirst Earl of ChathamPitt the Elder Related words Broader terms statesman WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.