plural cavities
1
: an unfilled space within a mass
especially
: a hollowed-out space
2
: an area of decay in a tooth : caries
Synonyms
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
Pretty much the only thing not high-tech on this machine is the bag roll storage, which is just a cavity on the back of the unit with a hinged cover.
—
Adam Campbell-Schmitt, Bon Appétit, 27 Jan. 2025
The team envisions using it as a living filling that would essentially regrow space formed by a cavity.
—Paul Smaglik, Discover Magazine, 24 Jan. 2025
Preliminary findings suggest the explosion was caused by an oxygen/fuel leak in a cavity above the engine firewall, resulting in a fire that overwhelmed the venting system, Musk said.
—Yaakov Katz, Newsweek, 17 Jan. 2025
The review concluded that there was insufficient evidence to support a link between moderate drinking and oral cavity, pharyngeal, esophageal, and laryngeal cancers.
—Ars Technica, 17 Jan. 2025
See all Example Sentences for cavity 
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Adam Campbell-Schmitt, Bon Appétit, 27 Jan. 2025
The team envisions using it as a living filling that would essentially regrow space formed by a cavity.
—Paul Smaglik, Discover Magazine, 24 Jan. 2025
Preliminary findings suggest the explosion was caused by an oxygen/fuel leak in a cavity above the engine firewall, resulting in a fire that overwhelmed the venting system, Musk said.
—Yaakov Katz, Newsweek, 17 Jan. 2025
The review concluded that there was insufficient evidence to support a link between moderate drinking and oral cavity, pharyngeal, esophageal, and laryngeal cancers.
—Ars Technica, 17 Jan. 2025
See all Example Sentences for cavity
Dictionary Entries Near cavity
Cite this Entry
“Cavity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cavity. Accessed 9 Feb. 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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