Meaning of knockout

knock•out

Pronunciation: (nok'out"), [key]
— n.
  1. an act or instance of knocking out.
  2. the state or fact of being knocked out.
  3. a knockout blow.
  4. a person or thing overwhelmingly attractive, appealing, or successful.
  5. a panel in a casing, can, or box, esp. of metal or plastic, so designed that it can readily be removed, as by punching, hammering, or cutting, to provide an opening into the interior: a knockout in a junction box.
  6. a device for knocking something loose, as finished work from a lathe chuck.
—adj.
  1. that knocks out: the knockout punch.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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