knock out (1) Meaning If you are knocked out, you are hit so hard that you lose consciousness. For example Muhammad Ali knocked out George Foreman in the eighth round and won the fight. He slipped over in the bathroom and knocked himself out. #Phrasal_Verb_of_the_Day ▬▬▬▬▬▬▬▬▬▬▬▬ ➠@PhrasalCards ➠@SlangWords ➠@IdiomsLand ➠@Vocabulix ➠@GrammarCards ➠@EnglishGate ➠@StoryPage 2.3K views03:30