a. one of a pair of wood, metal, or plastic runners that are used for gliding over snow. Skis are commonly attached to shoes for sport, but may also be used as landing gear for aircraft, etc
b. (as modifier): a ski boot
2.
a water-ski
—vb , skis, ski, skis, skiing, skied, ski'd
3.
(intr) to travel on skis
[C19: from Norwegian, from Old Norse skith snowshoes; related to Old English scīd piece of split wood]