To separate and drive off the chaff from grain by means of wind. Grain is winnowed by a fan, or by a machine, or by pouring it out of a vessel in a current of air.

To fan; to beat as with wings.

To examine; to sift for the purpose of separating falsehood from truth. Winnow well this thought.

To separate, as the bad from the good.

To separate chaff from corn. Winnow not with every wind.