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
Mellencamp was diagnosed with stage 4 cancer earlier this year after her melanoma metastasized in her brain and lungs.
—
Stephanie Giang-Paunon, FOXNews.com, 18 July 2025
The reality star — who has been documenting her ongoing melanoma diagnosis after undergoing 17 surgeries for the invasive skin cancer — confirmed in April that her disease progressed to stage 4, having metastasized to her brain and lungs.
—Vanessa Etienne, People.com, 18 July 2025
People with heart or lung disease, older adults, and children were advised to reduce prolonged or heavy exertion.
—Joe Edwards, MSNBC Newsweek, 18 July 2025
Teddi Mellencamp had already had more than 17 different spots of melanoma removed when doctors found multiple brain and lung tumors in her body earlier this year.
—Kyle Richards, Glamour, 17 July 2025
See All Example Sentences for lung
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Stephanie Giang-Paunon, FOXNews.com, 18 July 2025
The reality star — who has been documenting her ongoing melanoma diagnosis after undergoing 17 surgeries for the invasive skin cancer — confirmed in April that her disease progressed to stage 4, having metastasized to her brain and lungs.
—Vanessa Etienne, People.com, 18 July 2025
People with heart or lung disease, older adults, and children were advised to reduce prolonged or heavy exertion.
—Joe Edwards, MSNBC Newsweek, 18 July 2025
Teddi Mellencamp had already had more than 17 different spots of melanoma removed when doctors found multiple brain and lung tumors in her body earlier this year.
—Kyle Richards, Glamour, 17 July 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 22 Jul. 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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