noun1. either of the two spongelike respiratory organs in the thorax of vertebrates, thatoxygenate the blood and remove carbon dioxide from it
2. any analogous organ in invertebrates
Idioms: at the top of one's lungs
Word 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