- knockout
- knock|out1 [ˈnɔk-aut US ˈna:k-] n1.) when a ↑boxer hits his opponent so hard that he falls down and cannot get up again▪ The fight ended in a knockout.2.) informal someone or something that is very attractive or successful▪ Her dress was a knockout.3.) a type of competition in which only the winning players or teams at each stage continue to play until there is only one winnerknockout 2knockout2 adj informal1.) knockout punch/blowa) a hard hit that knocks someone down so that they cannot get up againb) an action or event that causes defeat or failure▪ High interest rates have been a knockout blow to the business.2.) relating to a type of competition in which only the winning players or teams at each stage continue to play▪ Scotland's failure to get through the knockout stage of the competition3.) knockout pills/drops etc↑pills etc that make someone unconscious
Dictionary of contemporary English. 2013.