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winnow  (winnows 3rd person present) (winnowing present participle) (winnowed past tense & past participle )If you winnow a group of things or people, you reduce its size by separating the ones that are useful or relevant from the ones that are not. 
LITERARY  verb 
Administration officials have winnowed the list of candidates to three.  V n winnow out  phrasal verb If you winnow out part of a group of things or people, you identify the part that is not useful or relevant and the part that is. 
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