: a thick, opaque, usually yellowish-white, fluid matter that is formed as part of an inflammatory response typically associated with an infection and is composed of exudate chiefly containing dead white blood cells (such as neutrophils), tissue debris, and pathogenic microorganisms (such as bacteria)
Examples of pus in a Sentence
Pus oozed from the cat's injured ear.
Recent Examples on the Web
At their best, wound infections can result in discomfort, red, angry skin, and pus (ew!).
—
Amelia McBride, Travel + Leisure, 11 Apr. 2025
Val Kilmer tributes: Celebrities remember 'icon' 'Top Gun' actor
Lung abscesses occur when pockets of pus form inside or around the lung.
—Adrianna Rodriguez, USA Today, 2 Apr. 2025
These infections are caused by tooth abscess—an accumulation of a pocket of pus from tooth decay.
—Francisco J. Rivera Rosario, Health, 11 Mar. 2025
The pus will drain from several points on the carbuncle.
—Angelica Bottaro, Verywell Health, 25 Feb. 2025
See All Example Sentences for pus
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Amelia McBride, Travel + Leisure, 11 Apr. 2025
Val Kilmer tributes: Celebrities remember 'icon' 'Top Gun' actor
Lung abscesses occur when pockets of pus form inside or around the lung.
—Adrianna Rodriguez, USA Today, 2 Apr. 2025
These infections are caused by tooth abscess—an accumulation of a pocket of pus from tooth decay.
—Francisco J. Rivera Rosario, Health, 11 Mar. 2025
The pus will drain from several points on the carbuncle.
—Angelica Bottaro, Verywell Health, 25 Feb. 2025
See All Example Sentences for pus
Cite this Entry
“Pus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pus. Accessed 3 May. 2025.
Copy CitationKids Definition
pus
noun
: thick cloudy usually yellowish white fluid matter formed at a place of inflammation and infection (as an abscess) and containing white blood cells, tissue debris, and germs
Medical Definition
pus
noun
: a thick, opaque, usually yellowish-white, fluid matter that is formed as part of an inflammatory response typically associated with an infection and is composed of exudate chiefly containing dead white blood cells (as neutrophils), tissue debris, and pathogenic microorganisms (as bacteria)
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