Excellency (noun)

1. Used as a title for a high-ranking official, such as a governor or ambassador.
2. Used as a form of address for a person of high rank or office.
3. Supremacy, high quality.

Origin:

Mid 16th century (as an adjective in the sense "superior"): from latin excellentia, from excellere "excel".

Examples:

1. His Excellency the Governor will be attending the event.
2. I had the honor of meeting His Excellency the President.
3. We shall always remember his Excellency in our hearts.
4. The Excellency of the work is that it is accurate and reliable.
5. The Excellency of the service made us return to the hotel.