Emily Dickinson Lexicon

A-RE'NA, n. [L. arena, sand.]

1. An open space of ground, strewed with sand, on which the gladiators, in ancient Rome, exhibited shows of fighting for the amusement of spectators. Hence, a place for public exhibition. – Adam's Rom. Ant. Ray.
2. Among physicians, sand or gravel in the kidneys.
3. The middle of a temple or inclosed place.