1. A large amphitheater or stadium, especially one used for sports, concerts, or public entertainment
The coliseum in Rome is one of the most famous landmarks in the world.
O coliseu em Roma é um dos pontos turísticos mais famosos do mundo.
2. Any large, impressive building used for public events and gatherings
The city built a new coliseum to host the basketball championship.
A cidade construiu um novo coliseu para sediar o campeonato de basquete.