The definition of a lung is a sponge like organ used for breathing that is found in the chest cavity in humans and animals.(noun)
An example of a lung is the organ that puts oxygen in the blood and removes carbon dioxide.
See lung in Webster's New World College Dictionary
Origin: ME lunge < OE lungen, akin to Ger lunge < IE base *legwh-, light in weight and movement: the lungs were so named because of their lightness: see lights
See lung in American Heritage Dictionary 4
Origin: Middle English lunge
Origin: , from Old English lungen, lungs; see legwh- in Indo-European roots.
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