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.
   [1913 Webster]

         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.
      [1913 Webster]

            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.
      [1913 Webster]

   3. Dignity; elevation of manner or style. --Dryden.
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The Collaborative International Dictionary of English v.0.48:

Apostolic \Ap`os*tol"ic\, Apostolical \Ap`os*tol"ic*al\, a. [L.
   apostolicus, Gr. ?: cf. F. apostolique.]
   1. Pertaining to an apostle, or to the apostles, their times,
      or their peculiar spirit; as, an apostolical mission; the
      apostolic age.
      [1913 Webster]

   2. According to the doctrines of the apostles; delivered or
      taught by the apostles; as, apostolic faith or practice.
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   3. Of or pertaining to the pope or the papacy; papal.
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   Apostolical brief. See under Brief.

   Apostolic canons, a collection of rules and precepts
      relating to the duty of Christians, and particularly to
      the ceremonies and discipline of the church in the second
      and third centuries.

   Apostolic church, the Christian church; -- so called on
      account of its apostolic foundation, doctrine, and order.
      The churches of Rome, Alexandria, Antioch, and Jerusalem
      were called apostolic churches.

   Apostolic constitutions, directions of a nature similar to
      the apostolic canons, and perhaps compiled by the same
      authors or author.

   Apostolic fathers, early Christian writers, who were born
      in the first century, and thus touched on the age of the
      apostles. They were Polycarp, Clement, Ignatius, and
      Hermas; to these Barnabas has sometimes been added.

   Apostolic king (or majesty), a title granted by the pope
      to the kings of Hungary on account of the extensive
      propagation of Christianity by St. Stephen, the founder of
      the royal line. It is now a title of the emperor of
      Austria in right of the throne of Hungary.

   Apostolic see, a see founded and governed by an apostle;
      specifically, the Church of Rome; -- so called because, in
      the Roman Catholic belief, the pope is the successor of
      St. Peter, the prince of the apostles, and the only
      apostle who has successors in the apostolic office.

   Apostolical succession, the regular and uninterrupted
      transmission of ministerial authority by a succession of
      bishops from the apostles to any subsequent period.
      --Hook.
      [1913 Webster]

WordNet (r) 3.0 (2006):

majesty
    n 1: impressiveness in scale or proportion [syn: stateliness,
         majesty, loftiness]

Moby Thesaurus II by Grady Ward, 1.0:

120 Moby Thesaurus words for "majesty":
   Babylonian splendor, anointed king, augustness, brilliance,
   caliphate, chief, chieftain, consequence, courtliness,
   crowned head, czardom, dignifiedness, dignity, distinction, dynast,
   elaborateness, elegance, elevation, eminence, emperor, emperorship,
   empery, empire, eternity, fame, glory, gorgeousness, grand duke,
   grandeur, grandiosity, grandness, gravity, heroism, high chief,
   holiness, immutability, imperator, imperialism, imposingness,
   impressiveness, infinite goodness, infinite justice, infinite love,
   infinite mercy, infinite power, infinite wisdom, infinity,
   kaiserdom, kaisership, king, king-emperor, kinghood, kinglet,
   kingliness, kingship, lavishness, light, loftiness, lord paramount,
   lordliness, luxuriousness, luxury, magnanimity, magnificence,
   monarch, nobility, notability, omnipotence, omnipotency,
   omnipresence, omniscience, omnisciency, overlord, paramount,
   petty king, plushness, poshness, potentate, pride of bearing,
   pride of place, prince, prince consort, princeliness, prominence,
   proud bearing, proudness, queenhood, queenship, rajaship, regality,
   regnancy, renown, resplendence, ritziness, royal, royal personage,
   royalty, ruler, sedateness, sobriety, solemnity, sovereign,
   sovereignty, splendidness, splendiferousness, splendor, state,
   stateliness, sublimity, sultanate, sultanship, sumptuousness,
   suzerain, tetrarch, the crown, the throne, ubiquity, unity,
   venerability, worthiness



Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "Majesty":
   Eminence, Grace, Her Excellency, Her Highness, Her Ladyship,
   Her Majesty, Highness, His Lordship, His Majesty, Honor,
   Imperial Highness, Imperial Majesty, Lady, Ladyship, Lord,
   Lordship, My Lady, My Lord, Reverence, Royal Highness,
   Royal Majesty, Serene Highness, Worship, Your Lordship, milady,
   milord



Bouvier's Law Dictionary, Revised 6th Ed (1856):

MAJESTY. Properly speaking, this term can be applied only to God, for it
signifies that which surpasses all things in grandeur and superiority. But
it is used to kings and emperors, as a title of honor. It sometimes means
power, as when we say, the majesty of the people. See, Wolff, Sec. 998.



The Devil's Dictionary (1881-1906):

MAJESTY, n.  The state and title of a king.  Regarded with a just
contempt by the Most Eminent Grand Masters, Grand Chancellors, Great
Incohonees and Imperial Potentates of the ancient and honorable orders
of republican America.