Definition of 'knock out'

Verb

1. eliminate; "knock out a target"
2. knock unconscious or senseless; "the boxing champion knocked out his opponent in a few seconds"
      Synonyms: knock cold kayo
3. destroy or break forcefully; "The windows were knocked out"
4. overwhelm with admiration; "All the guys were knocked out by her charm"
5. empty (as of tobacco) by knocking out; "knocked out a pipe"

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