knockout UK /ˈnɒk.aʊt/US /ˈnɑk.oʊt/noun 12adjective 4forms 1 noun12 •The act of making one unconscious, or at least unable to come back on one's feet within a certain period of time; a TKO.The boxer scored a knockout on his opponent. •A tournament in which a team or player must beat the opponent in order to progress to the next round.the knockout stages of the competition •(informal) Something wildly popular, entertaining, or funny.If you've ever had a sack race, you know it's a real knockout for kids and adults alike. •(informal) A very attractive person, especially a beautiful woman.“There’s a girl wants to see you. Her name’s Wonderly.” “A customer?” “I guess so. You’ll want to see her anyway: she’s a knockout.” — 1930 •The deactivation of anything.Pull the plug on a node to see how the network handles a node knockout. — 1989 •The deactivation of a particular gene. •A creature engineered with a particular gene deactivated. •A partially punched opening meant for optional later removal.They left a knockout in the panel for running extra wires someday. •A simple game for two or more players, derived from basketball. •An event where a foreground color causes a background color not to print. •Ellipsis of knockout auction. •(US) A woman in Total Nonstop Action Wrestling. adjective4 •Rendering someone unconscious.He delivered a knockout blow. •Causing elimination from a competition.Rodolph Austin delivered the knockout blow from close range 20 minutes from time, after Aidan White had given Leeds a dream start after four minutes. — 2012 •Amazing; gorgeous; beautiful.You should have seen her knockout eyes. •Designating an organism in which a particular gene has been removed or deactivated.The result is a so-called knockout mouse, reared with a single gene silenced, the better to reveal that gene's true purpose. — 1999 formsknockouts
