Definitions for "Winnow"
To separate, and drive off, the chaff from by means of wind; to fan; as, to winnow grain.
To sift, as for the purpose of separating falsehood from truth; to separate, as bad from good.
the act of separating grain from chaff; "the winnowing was done by women"
To beat with wings, or as with wings.
blow on; "The wind was winnowing her hair"