XS Views 12 meanings found XS is widely used to label the extra‑small size in apparel, but it also appears in medical notes to mean excessive, in tech as an XML server abbreviation, and in sports circles for extreme‑sport activities. Medical Excessive Miscellaneous Extra Small Xtra Short XS stands XML Server Xiaolin Showdown Community Xtra Song Governmental X-axis of Solid rocket booster Computing X Script Business Xenith Studios Sports Xtreme Sport Xtreme Sports