Definition of screen out phrasal verb from the Oxford Advanced American Dictionary

 

screen out

 phrasal verb
phrasal verb
 
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Phrasal Verbs

screen somebodyout

 
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to decide not to allow someone to join an organization, enter a country, etc. because you think they may cause trouble

screen somethingout

 
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to prevent something harmful from entering or going through something The ozone layer screens out dangerous rays from the sun.
See the Oxford Advanced Learner's Dictionary entry: screen out