Source : Webster's Revised Unabridged Dictionary (1913)

Grand \Grand\, a. [Compar. {Grander}; superl. {Grandest}.] [OE.
   grant, grount, OF. grant, F. grand, fr. L. grandis; perh.
   akin to gravis heavy, E. grave, a. Cf. {Grandee}.]
   1. Of large size or extent; great; extensive; hence,
      relatively great; greatest; chief; principal; as, a grand
      mountain; a grand army; a grand mistake. ``Our grand foe,
      Satan.'' --Milton.

            Making so bold . . . to unseal Their grand
            commission.                           --Shak.

   2. Great in size, and fine or imposing in appearance or
      impression; illustrious, dignifled, or noble (said of
      persons); majestic, splendid, magnificent, or sublime
      (said of things); as, a grand monarch; a grand lord; a
      grand general; a grand view; a grand conception.

            They are the highest models of expression, the
            unapproached masters of the grand style. --M.
                                                  Arnold.

   3. Having higher rank or more dignity, size, or importance
      than other persons or things of the same name; as, a grand
      lodge; a grand vizier; a grand piano, etc.

   4. Standing in the second or some more remote degree of
      parentage or descent; -- generalIy used in composition;
      as, grandfather, grandson, grandchild, etc.

            What cause Mov'd our grand parents, in that happy
            state, Favor'd of Heaven so highly, to fall off From
            their Creator.                        --Milton.

   {Grand action}, a pianoforte action, used in grand pianos, in
      which special devices are employed to obtain perfect
      action of the hammer in striking and leaving the string.
      

   {Grand Army of the Republic}, an organized voluntary
      association of men who served in the Union army or navy
      during the civil war in the United States. The order has
      chapters, called Posts, throughout the country.