Simple Definition of cavity
: a hole or space inside something
: a hole formed in a tooth by decay
Full Definition of cavity
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.
Origin of cavity
Middle French cavité, from Late Latin cavitas, from Latin cavus
First Known Use: 1541
Rhymes with cavity
CAVITY Defined for Kids
Definition of cavity for Students
1 : a small hole formed in a tooth by decay
2 : a hollow place <The explosion left a cavity in the ground.>
Learn More about cavity
Thesaurus: All synonyms and antonyms for "cavity" Medical Dictionary: Definition of "cavity" Spanish Central: Translation of "cavity" Nglish: Translation of "cavity" for Spanish speakers Britannica English: Translation of "cavity" for Arabic speakers Britannica.com: Encyclopedia article about "cavity"
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