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English definition of “blot sth out”

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blot sth out

verb [T] uk phrasal verb with blot   /blɒt/ us    /blɑːt/ (-tt-)

(SUN)

to hide or block the light from something, especially the sun: A dark cloud suddenly blotted out the sun.

(MEMORY)

to stop yourself thinking about something unpleasant: Perhaps there are some memories so bad that you have to blot them out.
(Definition of blot sth out from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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