meningitisPronunciation: /ˌmɛnɪnˈdʒʌɪtɪs/Translate meningitis | into French | into German | into Italian | into Spanish Definition of meningitis noun [mass noun] a serious disease in which there is inflammation of the meninges, caused by viral or bacterial infection, and marked by intense headache and fever, sensitivity to light, and muscular rigidity. Derivatives meningiticPronunciation: /-ˈdʒɪtɪk/ adjective meningitis in other Oxford dictionaries Definition of meningitis in the US English dictionary