Source : Webster's Revised Unabridged Dictionary (1913)

Mohammedan \Mo*ham"med*an\, a. [From Mohammed, fr. Ar.
   muh['a]mmad praiseworthy, highly praised.]
   Of or pertaining to Mohammed, or the religion and
   institutions founded by Mohammed. [Written also {Mahometan},
   {Mahomedan}, {Muhammadan}, etc.]

Muhammadan \Mu*ham"mad*an\, Muhammedan \Mu*ham"med*an\, a. & n.
   Mohammedan.

Source : WordNet®

Muhammadan
     adj : of or relating to the Arabian prophet Muhammad or to the
           religion he founded [syn: {Mohammedan}]

Muhammadan
     n : a believer or follower of Islam [syn: {Muslim}, {Moslem}, {Mohammedan},
          {Muhammedan}, {Islamist}]