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knock out - definition and synonyms

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phrasal verb [transitive]
Word Forms
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present tense
I/you/we/theyknock out
he/she/itknocks out
present participleknocking out
past tenseknocked out
past participleknocked out
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  1. 1
    to make someone unconscious
    He hit me and nearly knocked me out.
  2. 2
    to make someone leave a competition by defeating them
    The home team was knocked out of the tournament in the first round.
  3. 3
    to destroy something, or to stop it working
    The earthquake knocked out power supplies in many parts of the city.
  4. 4
    knock someone out informal to impress someone very much
    The response to my work has absolutely knocked me out.
  5. 6
    informal to produce something quickly or carelessly
    They’ve been knocking out candles at their factory since 1831.
  6. 7
    knock something out of someone to make someone lose a quality
    All the enthusiasm had been knocked out of him.
  7. 8
    knock yourself out informal to do a lot of work in order to achieve something
See also main entry: knock

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