Definition Of winnows
(of the wind) blow.
the autumn wind winnowing its way through the grass
blow a current of air through (grain) in order to remove the chaff.
As, when grain is shaken and winnowed by fans and other instruments used in the threshing of corn, the close and heavy particles are borne away and settle in one direction, and the loose and light particles in another.
Example Of winnows
A 19th century hand-powered barn winnowing machine using volunteers' muscle power will then separate the grain from the chaff before milling, using machines from replica Stone Age querns to a Bamford mill powered by a 1930 tractor.
A person in clean moccasins then ‘danced the rice’ treading on it to remove the hull and then tossing it into the air to winnow the chaff.
A woman winnowing grain in the Virunga National Park.
After all the grain have been removed from the mahangu heads this grain must be winnowed to remove the husks.
Also you may occasionally see her out in the fields helping her mother, Memnet, crush and winnow the grain.