Word of the Day - winnow

winnow

/ˈwɪnəʊ/
verb
1 with object Blow a current of air through (grain) in order to remove the chaff.
1.1 Remove (chaff) from grain.
1.2 Remove (people or things) from a group until only the best ones are left.
1.3 Find or identify (a valuable or useful part of something)
literary no object (of the wind) blow.
2.1 with object (of a bird) fan (the air) with its wings.

Origin
Old English windwian, from wind (see wind).

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In the age of digital dictionaries, we should ask lexicographers to winnow out this type of definition: "Winnower - see winnow".