WINNOW SB/STH OUT (OF STH)
Meaning of WINNOW SB/STH OUT (OF STH) in English
( formal ) to remove people or things from a group so that only the best ones are left
SYN sift out
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005