Source : Webster's Revised Unabridged Dictionary (1913)

Melodramatic \Mel`o*dra*mat"ic\, a. [Cf. F. m['e]lodramatique.]
   Of or pertaining to melodrama; like or suitable to a
   melodrama; unnatural in situation or action. --
   {Mel`o*dra*mat"ic*al*ly}, adv.

Source : WordNet®

melodramatic
     adj 1: having the excitement and emotional appeal of melodrama; "a
            melodramatic account of two perilous days at sea"
     2: characteristic of acting or a stage performance; often
        affected; "histrionic gestures"; "an attitude of
        melodramatic despair"; "a theatrical pose" [syn: {histrionic}]