Ex ‧ cel ‧ len ‧ cy /ˈeks ə lənsi/ BrE AmE noun
[ Word Family: noun : ↑ excellence , ↑ Excellency ; verb : ↑ excel ; adverb : ↑ excellently ; adjective : ↑ excellent ]
Your/His/Her Excellency a way of talking to or about people who hold high positions in the state or the church:
His Excellency the Spanish ambassador