Definition of amphitheater noun from the Oxford Advanced American Dictionary

     

    amphitheater

     noun
    (amphitheatre)noun
    NAmE//ˈæmfəˌθiət̮ər//
     
     
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  1. 1a round building without a roof and with rows of seats that rise in steps around an open space. Amphitheaters were used especially in ancient Greece and Rome for public entertainments.
  2. 2a room, hall, or theater with rows of seats that rise in steps
  3. 3(technology) an open space that is surrounded by high sloping land The path emerges from the gorge into an open amphitheater with slopes all around.