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

 

block out

 phrasal verb
phrasal verb
 
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Phrasal Verbs

    block somethingout

     
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  1. 1to stop light or noise from coming in Black clouds blocked out the sun. He put his hands over his ears to block out the noise.
  2. 2to stop yourself from thinking about or remembering something unpleasant Over the years she had tried to block out that part of her life.
See the Oxford Advanced Learner's Dictionary entry: block out