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colosseum

/kəˈlɒsiːəm/ · col·os·se·um
noun
  1. A large theatre, cinema, or stadium. The London Coliseum is a famous example of a colosseum in the United Kingdom.
  2. A large, often circular building, for indoor sporting events, exhibitions, concerts, etc.; arena. The ancient Roman Colosseum was a massive colosseum used for gladiatorial contests and public events.
Did you know? The ancient Roman Colosseum was the largest amphitheatre in the Roman Empire, capable of holding up to 50,000 spectators, and was a symbol of Roman power and engineering prowess.
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Written by Lexi Wordsworth, Dictionary Editor 1 lookups Added Aug 14, 2026