A hollow space or cavity, particularly the auditorium or seating area in a Roman theater or amphitheater.
From Latin 'cavea', meaning hollow space, cavity, or the seating section of a theater, derived from 'cavus' (hollow).
In Roman theaters, the 'cavea' was the entire seating area carved into hillsides—the word survives in 'cavity' and architectural terms, reminding us that Romans mastered designing spaces for thousands of spectators.
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