The Right Honourable
The Right Honourable (abbreviation: The Rt Hon. or Rt Hon.) is an honorific style traditionally applied to certain persons and collective bodies in the United Kingdom, the former British Empire and the Commonwealth of Nations. The term is predominantly used today as a style associated with the holding of certain senior public offices in the United Kingdom, Canada, and New Zealand.
"Right" in this context is an adverb meaning "thoroughly" or "very".