Definition of pre-pardon in US English:

pre-pardon

noun

rare
  • Pardon beforehand; a pardon for an offence before it is committed.

Origin

Early 17th century; earliest use found in John Donne (1572–1631), poet and Church of England clergyman. From pre- + pardon.

Pronunciation

pre-pardon

/priːˈpɑːdn/