What is Honourable ?
Honourable is (adj) 1. who or which can be respected He lived the rest of his life in honourable retirement. He did the honourable thing and resigned. (NOTE: The US spelling is honorable.) 2. a title used when one MP addresses another in Parliament The honourable Member for Putney would do well to remember the conditions in his constituency. (NOTE: usually shortened to Hon. in this meaning)
source: Easier English, Student Dictionary Upper Intermediate Level