plural cavities
1
: an unfilled space within a mass
especially
: a hollowed-out space
2
: an area of decay in a tooth : caries
Examples of cavity in a Sentence
Some birds nest in tree cavities.
I had two cavities filled at the dentist's.
Recent Examples on the Web
Barred owls are quite territorial and are generally considered cavity nesters.
—
The San Diego Union Tribune, San Diego Union-Tribune, 12 July 2025
This partially or fully severs the turtle’s head before the crab feeds from the cavity.
—Laura Baisas, Popular Science, 10 July 2025
Scientists have created micro-robots for sinus infection treatment that can enter the nasal cavity, eliminate bacteria directly at the source, and exit without harming surrounding tissue.
—Kurt Knutsson, FOXNews.com, 7 July 2025
In more severe cases, surgical options may be proposed to correct the scoliosis curve and restore balance to the thorax, creating vital space for the heart and lungs within the chest cavity.
—Richard Menger Md Mpa, Forbes.com, 30 June 2025
See All Example Sentences for cavity
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The San Diego Union Tribune, San Diego Union-Tribune, 12 July 2025
This partially or fully severs the turtle’s head before the crab feeds from the cavity.
—Laura Baisas, Popular Science, 10 July 2025
Scientists have created micro-robots for sinus infection treatment that can enter the nasal cavity, eliminate bacteria directly at the source, and exit without harming surrounding tissue.
—Kurt Knutsson, FOXNews.com, 7 July 2025
In more severe cases, surgical options may be proposed to correct the scoliosis curve and restore balance to the thorax, creating vital space for the heart and lungs within the chest cavity.
—Richard Menger Md Mpa, Forbes.com, 30 June 2025
See All Example Sentences for cavity
Cite this Entry
“Cavity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cavity. Accessed 23 Jul. 2025.
Copy CitationKids Definition
cavity
noun
cav·i·ty
ˈkav-ət-ē 
plural cavities
1
: a hollow place
especially
: an unfilled bodily space
lung cavity
2
: a hole hollowed out in a tooth by decay
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