DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   winnow
       n 1: the act of separating grain from chaff; "the winnowing was
            done by women" [syn: winnow, winnowing, sifting]
       v 1: separate the chaff from by using air currents; "She stood
            there winnowing chaff all day in the field" [syn: winnow,
            fan]
       2: blow on; "The wind was winnowing her hair"; "the wind
          winnowed the grass"
       3: select desirable parts from a group or list; "cull out the
          interesting letters from the poet's correspondence"; "winnow
          the finalists from the long list of applicants" [syn: cull
    out, winnow]
       4: blow away or off with a current of air; "winnow chaff"