Source : Webster's Revised Unabridged Dictionary (1913)

Malcontent \Mal"con*tent`\, a. [F., fr. mal ill + content. See
   {Malice}, {Content}.]
   discontented; uneasy; dissatisfied; especially, dissatisfied
   with the government. [Written also {malecontent}.]

         The famous malcontent earl of Leicester. --Milner.

Malcontent \Mal"con*tent`\, n. [F. malcontent.]
   One who discontented; especially, a discontented subject of a
   government; one who express his discontent by words or overt
   acts. --Spenser. Berkeley.

Source : WordNet®

malcontent
     adj : discontented as toward authority [syn: {disaffected}, {ill-affected},
            {rebellious}]
     n : a person who is discontented or disgusted