Noah Webster's New International Dictionary of the English Language

1. (n.) 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.

2. (n.) 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.

3. (n.) Dignity; elevation of manner or style.