Meaning & use
cavity
A hollow or empty space within an otherwise solid object or structure.
See it in a sentence
The dentist found a small cavity forming in one of her back teeth.
Engineers designed the wall with a hollow cavity to improve insulation.
A note on using this word
In everyday speech, 'cavity' most often refers specifically to tooth decay rather than a general hollow space.
Words with a similar meaning
holehollow
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Make it your own
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