[{"Bold_text": "noun", "List Items": ["the oval space in the center of a Roman amphitheater for gladiatorial combats or other performances.", "a central stage, ring, area, or the like, used for sports or other forms of entertainment, surrounded by seats for spectators:a boxing arena; a circus arena.", "a building housing an arena.", "a field of conflict, activity, or endeavor:the arena of politics."]}]