dry ski slope
US /ˌdraɪ skiː ˈsloʊp/
UK /ˌdraɪ skiː ˈsloʊp/

1.
a slope covered with a synthetic material that allows people to ski on it when there is no snow
:
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We practiced our turns on the dry ski slope before heading to the mountains.
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Many beginners start learning to ski on a dry ski slope.