1
a
: one of the usually paired compound saccular thoracic organs that constitute the basic respiratory organs of an air-breathing vertebrate
b
: any of various respiratory organs of invertebrates
2
a
: a device enabling individuals abandoning a submarine to rise to the surface
b
: a mechanical device for regularly introducing fresh air into and withdrawing stale air from the lung : respirator compare iron lung
Examples of lung in a Sentence
He filled his lungs with the clean. fresh air.
Recent Examples on the Web
McKesson never questioned her genetics – or considered 23andMe – until a team of surgeons performed an urgent, open-heart procedure in 2022 to remove clots from her heart and lungs.
—
Chelsea Bailey, CNN Money, 25 Oct. 2025
The researchers treated the lung cells with CSWE and its main compound, 1,8-cineole, then exposed them to molecules that mimic viral DNA and RNA, to simulate an infection.
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Once the sample is back at the lab, the beagles get to work looking for the four most common types of cancer - breast, colorectal, prostate, and lung.
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The doctors found blood clots in my lungs, a rare side effect from my surgery.
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Chelsea Bailey, CNN Money, 25 Oct. 2025
The researchers treated the lung cells with CSWE and its main compound, 1,8-cineole, then exposed them to molecules that mimic viral DNA and RNA, to simulate an infection.
—New Atlas, 25 Oct. 2025
Once the sample is back at the lab, the beagles get to work looking for the four most common types of cancer - breast, colorectal, prostate, and lung.
—Felicia Faber, FOXNews.com, 24 Oct. 2025
The doctors found blood clots in my lungs, a rare side effect from my surgery.
—Megan Sauer, CNBC, 24 Oct. 2025
See All Example Sentences for lung
Cite this Entry
“Lung.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lung. Accessed 4 Nov. 2025.
Copy CitationKids Definition
lung
noun1
a
: one of the usually paired organs forming the special breathing structure of vertebrates that breathe air
b
: any of various respiratory organs of invertebrates
2
: a device (as an iron lung) to promote breathing and make it easier
Medical Definition
lung
noun1
a
: one of the usually two compound saccular organs that constitute the basic respiratory organ of air-breathing vertebrates, that normally occupy the entire lateral parts of the thorax and consist essentially of an inverted tree of intricately branched bronchioles communicating with thin-walled terminal alveoli swathed in a network of delicate capillaries where the actual gaseous exchange of respiration takes place, and that in humans are somewhat flattened with a broad base resting against the diaphragm and have the right lung divided into three lobes and the left into two lobes
b
: any of various respiratory organs of invertebrates
2
: a mechanical device for regularly introducing fresh air into and withdrawing stale air from the lungs : respirator see iron lung
lunged
adjective
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