say it: KAV-uh-tee
cavity is a noun meaning "a sizeable hole (usually in the ground)". It carries 4 recorded senses.
a sizeable hole (usually in the ground)
“they dug a pit to bury the body”
space that is surrounded by something
soft decayed area in a tooth; progressive decay can lead to the death of a tooth
(anatomy) a natural hollow or sinus within the body
anatomy
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for cavity come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.