Definition of Ponsonby rule in English:

Ponsonby rule

noun

British
Politics
  • A constitutional convention by which the Government may ratify a treaty or agreement without parliamentary approval once it has been open to parliamentary scrutiny for a period of twenty-one days and raised no objections.

Origin

1950s; earliest use found in The Times. From the name of Arthur Augustus William Harry Ponsonby, English politician and peace campaigner, who introduced the practice in 1924 + rule.

Pronunciation

Ponsonby rule

/ˈpɒns(ə)nbi ˌruːl/