Webster's Revised Unabridged Dictionary · 1913

Majesty

Majesty , noun

[Old English magestee, French majesté, Latin majestas, from an old compar. of magnus great. See Major, Master.]

The dignity and authority of sovereign power; quality or state which inspires awe or reverence; grandeur; exalted dignity, whether proceeding from rank, character, or bearing; imposing loftiness; stateliness; -- usually applied to the rank and dignity of sovereigns.
The Lord reigneth; he is clothed with majesty. — Bible (KJV) - Psalm xciii. 1
No sovereign has ever represented the majesty of a great state with more dignity and grace. — Macaulay
2.
Hence, used with the possessive pronoun, the title of an emperor, king or queen; -- in this sense taking a plural; as, their majesties attended the concert.
In all the public writs which he [Emperor Charles V.] now issued as King of Spain, he assumed the title of Majesty, and required it from his subjects as a mark of respect. Before that time all the monarchs of Europe were satisfied with the appellation of Highness or Grace. — Robertson
3.
Dignity; elevation of manner or style. — Dryden