Source : Webster's Revised Unabridged Dictionary (1913)

Noble \No"ble\, a. [Compar. {Nobler}; superl. {Noblest}.] [F.
   noble, fr. L. nobilis that can be or is known, well known,
   famous, highborn, noble, fr. noscere to know. See {know}.]
   1. Possessing eminence, elevation, dignity, etc.; above
      whatever is low, mean, degrading, or dishonorable;
      magnanimous; as, a noble nature or action; a noble heart.

            Statues, with winding ivy crowned, belong To nobler
            poets for a nobler song.              --Dryden.

   2. Grand; stately; magnificent; splendid; as, a noble
      edifice.

   3. Of exalted rank; of or pertaining to the nobility;
      distinguished from the masses by birth, station, or title;
      highborn; as, noble blood; a noble personage.

   Note: Noble is used in the formation of self-explaining
         compounds; as, noble-born, noble-hearted, noble-minded.

   {Noble metals} (Chem.), silver, gold, and platinum; -- so
      called from their freedom from oxidation and permanence in
      air. Copper, mercury, aluminium, palladium, rhodium,
      iridium, and osmium are sometimes included.

   Syn: Honorable; worthy; dignified; elevated; exalted;
        superior; sublime; great; eminent; illustrious;
        renowned; stately; splendid; magnificent; grand;
        magnanimous; generous; liberal; free.