A hole or hollow depression in a solid object.
A small or large hole in a tooth caused by caries; often also a soft area adjacent to the hole also affected by caries.
Jim got two cavities filled at the dentist's office yesterday.
From Middle French cavité or Late Latin cavitās, from cav(i) (“hollow, excavated, concave”) + -tās (“-ity”, nominal suffix). First attested in the Mid-16th c.
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Lekhori