Pronunciation: (u-rē'nu),[key] —n. 1. the oval space in the center of a Roman amphitheater for gladiatorial combats or other performances.
2. 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. 3. a building housing an arena.
4. a field of conflict, activity, or endeavor: the arena of politics.