Ski/skiː/ Definition 1 of 4Pro Tip 1/3Winter Equipment Usually used in the context of winter snow sports like downhill skiing. We rented skis for our winter vacation. Pro Tip 2/3Recreational Activity Often implies recreational or competitive activity, can suggest travel to snowy destinations. They flew to Colorado to ski the rocky mountains. Pro Tip 3/3Snow Specific Used for an object specific to snow; not used for water or other surfaces. The chalet offered different sizes of snow skis for guests.