The American Heritage® Dictionary of the English Language, 4th Edition
n. An acute or chronic disease marked by inflammation of the lungs and caused by viruses, bacteria, or other microorganisms and sometimes by physical and chemical irritants.
n. An acute or chronic inflammation of the lungs caused by viruses, bacteria or other microorganisms, or sometimes by physical or chemical irritants.
the GNU version of the Collaborative International Dictionary of English
n. Inflammation of the lungs.
The Century Dictionary and Cyclopedia
n. Inflammation of the tissues of the lung, as distinct from inflammation of the bronchial tubes (bronchitis) and from inflammation of the serous covering of the lungs (pleuritis). Also called pneumonitis
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. respiratory disease characterized by inflammation of the lung parenchyma (excluding the bronchi) with congestion caused by viruses or bacteria or irritants
Word Usage
"New Treatment For Pneumonia Presented In Sweden A new medical study managed to find a connection between a probiotic bacterium called Lactobacillus plantarum 299 and a good recovery for patients suffering from pneumonia."