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black out

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phrasal verb
Word Forms
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present tense
I/you/we/theyblack out
he/she/itblacks out
present participleblacking out
past tenseblacked out
past participleblacked out
  1. 1
    [intransitive] to suddenly become unconscious

    He had blacked out as his car hit the tree.

  2. 2
    [transitive] to prevent someone from reading or seeing something by covering it with something dark

    Half the pages in the report had been blacked out for security reasons.

    Synonyms and related words for this sense of black out
See also main entry: black

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