Definition of "Winnow" :

noun: the act of separating grain from chaff

"The winnowing was done by women."

verb: blow away or off with a current of air

"Winnow chaff."

verb: select desirable parts from a group or list

"Winnow the finalists from the long list of applicants."

verb: separate the chaff from grain by using air currents

"She stood there winnowing grain all day in the field."

verb: blow on

"The wind was winnowing her hair."