Definition of "knockout" []

• The act of knocking out. (noun)
• The state of being knocked out. (noun)
• A blow that knocks out an opponent. (noun)
• Sports A victory in boxing in which one's opponent is unable to rise from the canvas within a specified time after being knocked down or is judged too injured to continue. (noun)
• Sports The act of winning a boxing match in this way: won the fight by a knockout. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Several rodent models have identified UDT in knockout models of hoxa10, hoxa11, hox13, cgrp, insl3, and great genes."
• "I was known as a knockout artist with one punch and was dubbed the dirtiest fighter on the continent."
• "Winners by knockout: Of the 16 nations that have progressed to the second round of the World Cup, the three most successful in knockout matches are Italy, Brazil and Germany."