The Right Honourable
The Right Honourable (abbreviation: Rt Hon. or variations) 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, New Zealand, and to a lesser extent, Australia.
Right in this context is an adverb meaning 'very' or 'fully'. Grammatically, The Right Honourable is an adjectival phrase which gives information about a person. As such, it is not considered correct to apply it in direct address, nor to use it on its own as a title in place of a name; but rather it is used in the third person along with a name or noun to be modified.[lower-alpha 1]
Right may be abbreviated to Rt, and Honourable to Hon., or both. The is sometimes dropped in written abbreviated form, but is always pronounced.