An instrument used for winnowing grain. In the East, fans are of two kinds: one a sort of fork, having three or four prongs, and a handle four feet long; with this they throw up the grain to the wind, that the chaff may be blown away: the other sort of fan is formed to produce wind when the air is calm, Isaiah 30:24 . This process illustrates the complete separation which Christ the Judge will effect between the righteous and the wicked, Jeremiah 15:7 Matthew 3:12 . See THRESHING .