lung

plural lungs

1. anatomyA biological organ of vertebrates that controls breathing and oxygenates the blood.

   I made a speaking trumpet of my hands and commenced to whoop “Ahoy!” and “Hello!” at the top of my lungs. […] The Colonel woke up, and, after asking what in brimstone was the matter, opened his mouth and roared “Hi!” and “Hello!” like the bull of Bashan.

   1913, Joseph C[rosby] Lincoln, chapter VII, in Mr. Pratt’s Patients, New York, N.Y.; London: D[aniel] Appleton and Company, →OCLC

   Synonyms: bellows, lights

2. in pluralCapacity for exercise or exertion; breath.

   He no longer has the lungs to play long rallies like he used to.

3. That which supplies oxygen or fresh air, such as trees, parklands, forest, etc., to a place.

   Afterwards he found that the vague feeling of alarm had spread to the clients of the underground railway, and that the Sunday excursionists began to return from all the South-Western "lungs" - Barnes, Wimbledon, Richmond Park, Kew, and so forth - at unnaturally early hours[.]

   1898, H.G. Wells, The War of the Worlds, London: William Heinemann, page 123

plural Lungs

1. A surname.