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
The medical examiner also reported that there was evidence of fluid in Strain's chest cavity, but no water in his lungs, confusing the family on his cause of death.
—
Mary Walrath-Holdridge, USA TODAY, 8 Mar. 2025
The glass sphere stopper lives underneath the cavity in the base of the piece.
—Wilder Davies, Bon Appétit, 7 Mar. 2025
In addition, about one in five children in the state are living with untreated cavities.
—Cindy Krischer Goodman, Orlando Sentinel, 3 Mar. 2025
Her work contributed to a greater understanding of blood types, how antibiotics interact with gut bacteria and the relationship between bacteria and dental cavities.
—Alex Knapp, Forbes, 28 Feb. 2025
See All Example Sentences for cavity
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Mary Walrath-Holdridge, USA TODAY, 8 Mar. 2025
The glass sphere stopper lives underneath the cavity in the base of the piece.
—Wilder Davies, Bon Appétit, 7 Mar. 2025
In addition, about one in five children in the state are living with untreated cavities.
—Cindy Krischer Goodman, Orlando Sentinel, 3 Mar. 2025
Her work contributed to a greater understanding of blood types, how antibiotics interact with gut bacteria and the relationship between bacteria and dental cavities.
—Alex Knapp, Forbes, 28 Feb. 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 12 Mar. 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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