Definition of Pittism in US English:

Pittism

noun

historical
  • The policies of or associated with William Pitt ‘the Younger’; support for or advocacy of these policies.

Origin

Early 19th century; earliest use found in Walter Scott (1771–1832), poet and novelist. From the name of William Pitt ‘the Younger’ + -ism.

Pronunciation

Pittism

/ˈpɪtɪz(ə)m/