Col‧os‧se‧um, the /ˌkɒləˈsiːəm $ ˌkɑːl-/ (also the Coliseum)
an amphitheatre (=large circular theatre without a roof) in Rome which was built during the first century AD and is now one of the most famous ancient Roman buildings. It is thought of especially as a place where fights involving gladiators and wild animals were organized as a form of entertainment.

[TahlilGaran] Dictionary of Contemporary English ▲