I. ski 1 /skiː/ BrE AmE noun ( plural skis ) [countable]
[ Date: 1700-1800 ; Language: Norwegian ; Origin: Old Norse skith 'stick of wood, ski' ]
1 . one of a pair of long thin narrow pieces of wood or plastic that you fasten to your boots and use for moving on snow or on water:
ski slopes
a ski resort (=where people can go skiing)
2 . a long thin narrow piece of strong material, fastened under a small vehicle so that it can travel on snow
II. ski 2 BrE AmE verb ( past tense and past participle skied , present participle skiing , third person singular skis ) [intransitive]
to move on skis for sport or in order to travel on snow or water ⇨ skiing :
I’m learning to ski.
We skied down to the village of Argentière.