Source : Webster's Revised Unabridged Dictionary (1913)

Deportment \De*port"ment\, n. [F. d['e]portement misconduct,
   OF., demeanor. See {Deport}.]
   Manner of deporting or demeaning one's self; manner of
   acting; conduct; carriage; especially, manner of acting with
   respect to the courtesies and duties of life; behavior;
   demeanor; bearing.

         The gravity of his deportment carried him safe through
         many difficulties.                       --Swift.

Source : WordNet®

deportment
     n : (behavioral attributes) the way a person behaves toward
         other people [syn: {demeanor}, {demeanour}, {behavior}, {behaviour},
          {conduct}]