A-rē'na, n.
n.; pl. A-RĒ'NĀS; Lat. pl. A-RĒ'NÆ. [Lat. arena, sand, a sandy place.]
Sense 1. (Rom. Antiq.) The area in the central part of an amphitheater, in which the gladiators fought and other shows were exhibited;—so called because it was covered with sand. Hence,
Sense 2. (Fig.) Any place of public contest or exertion; as, the arena of debate, the arena of life.
Sense 3. (Med.) Sand or gravel in the kidneys.
Sense 4. The middle of a temple or other inclosed place. Elmes.