v also winnow down [
Language: Old English; Origin: windwian]
[T] to make a list, group, or quantity smaller by getting rid of the things that you do not need or want
=
whittle down We need to winnow the list of candidates to three.winnow out [winnow sb/sth⇔out]
phr vto get rid of the things or people that you do not need or want from a group