a large building, such as a stadium or theatre, used for entertainments, sports, etc
WordReference Random House Learner's Dictionary of American English © 2026
col•i•se•um /ˌkɑlɪˈsiəm/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- a stadium or large theater for sporting events, exhibitions, etc.
col•i•se•um
(kol′i sē′əm),USA pronunciation n.
- Also, colosseum. an amphitheater, stadium, large theater, or other special building for public meetings, sporting events, exhibitions, etc.
- Antiquity(cap.) Colosseum.
- Medieval Latin Colisseum; see Colosseum
- 1700–10
Collins Concise English Dictionary © HarperCollins Publishers::
'coliseum' also found in these entries (note: many are not synonyms or translations):