noun
an inflammation of the meninges, the three membranes that cover the brain and spinal cord
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Meningitis is a serious medical condition characterized by inflammation of the protective membranes covering the brain and spinal cord.
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My friend was diagnosed with meningitis last week, but thankfully he is responding well to treatment.
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Dude, I heard that party got shut down because someone had meningitis. That's so messed up.
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The spread of misinformation online can be likened to a form of 'mental meningitis', infecting people's minds with false beliefs.