plural fungi
ˈfən-ˌjī 
ˈfəŋ-ˌgī
also funguses
ˈfəŋ-gə-səz
ˈfəŋ-ˌgī
also funguses
ˈfəŋ-gə-səz
often attributive
: any of a kingdom (Fungi) of saprophytic and parasitic spore-producing eukaryotic typically filamentous organisms formerly classified as plants that lack chlorophyll and include molds, rusts, mildews, smuts, mushrooms, and yeasts
Examples of fungus in a Sentence
Recent Examples on the Web
The fungus is active usually in spring and in cool, damp conditions.
—
Rita Perwich, San Diego Union-Tribune, 7 June 2025
Caused by several fungi, damping off is when new seedlings suddenly wither away and die.
—Brandee Gruener, Southern Living, 6 June 2025
Apartments would transform into humid hothouses, the perfect habitat for mosquitoes, water snakes, fungus, and rushes.
—Sarah Durn, Popular Science, 5 June 2025
Both were said to have researched the fungus as students in China, according to prosecutors.
—David Matthews, New York Daily News, 4 June 2025
See All Example Sentences for fungus
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Rita Perwich, San Diego Union-Tribune, 7 June 2025
Caused by several fungi, damping off is when new seedlings suddenly wither away and die.
—Brandee Gruener, Southern Living, 6 June 2025
Apartments would transform into humid hothouses, the perfect habitat for mosquitoes, water snakes, fungus, and rushes.
—Sarah Durn, Popular Science, 5 June 2025
Both were said to have researched the fungus as students in China, according to prosecutors.
—David Matthews, New York Daily News, 4 June 2025
See All Example Sentences for fungus
Cite this Entry
“Fungus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fungus. Accessed 19 Jun. 2025.
Copy CitationKids Definition
fungus
noun
fun·gus
ˈfəŋ-gəs
1
: any of a kingdom of living things (as molds, rusts, mildews, smuts, and mushrooms) that lack chlorophyll, are parasitic or live on dead or decaying organic matter, and were formerly considered plants
2
: infection with a fungus
fungus
adjective
Medical Definition
fungus
noun
fun·gus
ˈfəŋ-gəs
plural fungi
ˈfən-ˌjī also ˈfəŋ-ˌgī
also funguses
ˈfəŋ-gə-səz
often attributive
1
: any of the kingdom Fungi of saprophytic and parasitic spore-producing eukaryotic typically filamentous organisms formerly classified as plants that lack chlorophyll and include molds, rusts, mildews, smuts, mushrooms, and yeasts
2
: infection with a fungus
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