Definition of Colosseum in English:

Colosseum

proper noun

  • The name since medieval times of the Amphitheatrum Flavium, a vast amphitheatre in Rome, begun c.75 ad.

Origin

From Latin, neuter of colosseus gigantic, from colossus (see colossus).

Pronunciation:

Colosseum

/ˌkɒləˈsiːəm/