The Collaborative International Dictionary of English v.0.48:

Majesty \Maj"es*ty\, n.; pl. Majesties. [OE. magestee, F.
   majest['e], L. majestas, fr. 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.
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         The Lord reigneth; he is clothed with majesty. --Ps.
                                                  xciii. 1.
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         No sovereign has ever represented the majesty of a
         great state with more dignity and grace. --Macaulay.
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   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.
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            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.
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   3. Dignity; elevation of manner or style. --Dryden.
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