Source : Webster's Revised Unabridged Dictionary (1913)

Moreover \More*o"ver\, adv. [More + over.]
   Beyond what has been said; further; besides; in addition;
   furthermore; also; likewise.

         Moreover, he hath left you all his walks. --Shak.

   Syn: {Besides}, {Moreover}.

   Usage: Of the two words, moreover is the stronger and is
          properly used in solemn discourse, or when what is
          added is important to be considered. See {Besides}.

Source : WordNet®

moreover
     adv : in addition; "computer chess games are getting cheaper all
           the time; furthermore, their quality is improving";
           "the cellar was dark; moreover, mice nested there";
           "what is more, there's no sign of a change" [syn: {furthermore},
            {what is more}]