noun🔗Share肺炎An acute or chronic inflammation of the lungs caused by viruses, bacteria or other microorganisms, or sometimes by physical or chemical irritants."Grandmother developed pneumonia after a bad cold. "祖母はひどい風邪の後、肺炎を発症しました。medicinediseasemicroorganismvirusbiologyorganismanatomyChat with AIVocabulary GamePractice Reading