Webster's Revised Unabridged Dictionary · 1913

Excellency

Excellency , noun

1.
Excellence; virtue; dignity; worth; superiority.
His excellency is over Israel. — Bible (KJV) - Psalm lxviii. 34
Extinguish in men the sense of their own excellency. — Hooker
2.
A title of honor given to certain high dignitaries, esp. to viceroys, ministers, and ambassadors, to English colonial governors, etc. It was formerly sometimes given to kings and princes.