Medical Definition of aseptic meningitis
: meningitis not caused by a bacterial infection that is of the milder type typically caused by any of numerous viruses <In humans, the West Nile virus can cause encephalitis, a fatal swelling of the brain, and aseptic meningitis, a swelling of the lining of the brain and spinal cord.—Vaishali Honawar, The Washington Times, 4 Oct. 2000> <Among patients assessed for postoperative meningitis, aseptic meningitis as a result of the local inflammatory reaction to blood breakdown products may account for up to 70% of cases.—Diederik van de Beek et al., The New England Journal of Medicine, 14 Jan. 2010>
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