block out

phrasal verb

Definition of block out

1 : to hide or cover something so that it cannot be seen, felt, or heard Clouds blocked out the sun. We put on music to block out the sound of the traffic.
2 : to force oneself not to think about (something) He tried to block the event out.
3 : to ignore (something) blocking out distractions

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to gather or build up little by little

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