What is "windboard"

alt. 1 A snowboard or surfboard with an attached sail 2 (context climbing skiing English) The hard crust formed by high winds on exposed snow. 3 (context agriculture English) In a mechanical harvester, a board which shelters harvested grain and prevents it being blown away by the wind. n. 1 A snowboard or surfboard with an attached sail 2 (context climbing skiing English) The hard crust formed by high winds on exposed snow. 3 (context agriculture English) In a mechanical harvester, a board which shelters harvested grain and prevents it being blown away by the wind.