winnow(redirected from winnows)Also found in: Dictionary, Thesaurus, Legal.1. To remove some material, such as chaff, from grain by means of a current of air: Modern machines can winnow away all the chaff very efficiently. The farmers winnow the chaff away by flinging the grain into the air with a large blanket. 2. To get rid of some unfit or undesirable part; eliminate something or someone: The process will winnow away the weakest candidates. The editor winnowed most of the errors away. 3. To reduce some group by separating or eliminating the unfit or undesirable part: The process winnowed away the field of candidates. 4. To remove some material from a mixture by means of a current of air or water: The wind has winnowed away the sand from the soil. Water currents pick up mud from the riverbank and winnow it away, exposing the rock. 1. To separate some material, such as chaff, from grain by means of a current of air: The farmer winnows out the chaff with a machine. There is always some debris in the harvest, but we winnow it out. 2. To separate or get rid of some unfit or undesirable part; eliminate something or someone: The lions tend to winnow out the sick antelope. The political process will winnow the weakest candidates out. 3. To sort or select some fit or desirable part; extract someone or something: We winnowed out the top candidates from the rest and interviewed them. There are only a few good pieces of wood in this shipment, and it will take a long time to winnow them out.4. To rid some group of unfit or undesirable members: The test winnowed out the applicant pool.