characterized by a sense of honour

For Brutus is an honourable man; so are they all, all honourable men — Shakespeare

worthy of respect

an honourable contribution

noble; illustrious

of honourable descent

(often Honourable) used as a title for the children of certain British noblemen and for various government officials, and as a respectful epithet for fellow Members of Parliament

consistent with an untarnished reputation

an honourable discharge

dated or humorous said of the intentions of a suitor: involving marriage