winnow
n : the act of winnowing [syn: {winnowing}, {sifting}]
v 1: separate from chaff; of grain [syn: {fan}]
2: blow on; "The wind was winnowing her hair"
3: separate wheat from chaff; "She stood there winnowing all
day in the field"
4: treat by exposure to a current of air so that waste matter
is eliminated, as of grain
5: remove by a current of air, as of chaff