: a viscid slippery secretion that is usually rich in mucins and is produced by mucous membranes which it moistens and protects
Examples of mucus in a Sentence
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Endobronchial mucus means there is mucus and fluid in the deep parts of the lung or lungs, causing a bronchospasm, also known as a coughing attack, doctors said.
—
Mary Kekatos, ABC News, 21 Apr. 2025
Saline nasal sprays, comprised of a mixture of sodium chloride (salt) and water, help flush out excess mucus (snot) and debris from the nasal passages while adding moisture.1
How fast does a fungal sinus infection progress?
—Laura Schober, Health, 14 Apr. 2025
Specifically, short-chain fatty acids nourish the cells within your gut lining, promoting a healthy intestinal barrier and mucus production and lowering inflammation.
—Beth Krietsch, SELF, 7 Apr. 2025
Infection Infections such as the common cold or influenza (the flu) cause inflammation in the airways and increase mucus production and airway sensitivity.
—Lindsay Curtis, Verywell Health, 7 Apr. 2025
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Mary Kekatos, ABC News, 21 Apr. 2025
Saline nasal sprays, comprised of a mixture of sodium chloride (salt) and water, help flush out excess mucus (snot) and debris from the nasal passages while adding moisture.1
How fast does a fungal sinus infection progress?
—Laura Schober, Health, 14 Apr. 2025
Specifically, short-chain fatty acids nourish the cells within your gut lining, promoting a healthy intestinal barrier and mucus production and lowering inflammation.
—Beth Krietsch, SELF, 7 Apr. 2025
Infection Infections such as the common cold or influenza (the flu) cause inflammation in the airways and increase mucus production and airway sensitivity.
—Lindsay Curtis, Verywell Health, 7 Apr. 2025
See All Example Sentences for mucus
Cite this Entry
“Mucus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mucus. Accessed 30 Apr. 2025.
Copy CitationKids Definition
mucus
noun
mu·cus
ˈmyü-kəs 
: a slippery sticky substance produced especially by mucous membranes which it moistens and protects
Medical Definition
mucus
noun
mu·cus
ˈmyü-kəs
: a viscid slippery secretion that is usually rich in mucins and is produced by mucous membranes which it moistens and protects
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