Xyst (zĭst) or Xys'tus (zĭs'-), n.

n. [Fr. xyste, Lat. xystus, Gr. ξυστός, from ξέειν, to scrape, polish; — so called from its smooth and polished floor.] (Anc. Arch.) A long and open, or sometimes covered, court, with porticoes, for athletic exercises, as wrestling, running, and the like.