xystus

1. Roman garden planted with groves of plane-trees, usually laid out with flower-beds and surrounded with a colonnaded ambulatory, like a cloister.

2. Long covered portico, open-sided colonnade, or court used for athletic exercises in Ancient Greece.

3. Covered promenade.

4. Church ambulatory.

5. Long loggia or verandah.

6. Hypaethral walk, shaded by trees.

7. Part of a Roman house, bigger than an atrium, surrounded by a peristyle, and planted in the middle.