Source : Webster's Revised Unabridged Dictionary (1913)

Meningitis \Men`in*gi"tis\, n. [NL. See {Meninges}, and
   {-itis}.] (Med.)
   Inflammation of the membranes of the brain or spinal cord.

   {Cerebro-spinal meningitis}. See under {Cerebro-spinal}.

Source : WordNet®

meningitis
     n : infectious disease characterized by inflammation of the
         meninges (the tissues that surround the brain or spinal
         cord) usually caused by a bacterial infection; symptoms
         include headache and stiff neck and fever and nausea