-nsē, -si noun
( -es )
Etymology: Middle English excellencie, from Latin excellentia
1. : excellence ; usually : outstanding or valuable quality — used chiefly in plural
noting one another's excellencies and defects
2. : a person of notable position, dignity, or worth — used in a title or in a mode of address to certain high dignitaries (as a Roman Catholic bishop, a governor of a state, an ambassador, a viceroy) and then usually cap.
His Excellency the Bishop