knockknock1 /nɑk/ ●●● verb 
1
[intransitive] to hit a door or window with your closed hand in order to attract the attention of the people inside: 
I’ve been knocking at/on the door for five minutes.THESAURUShit, bang, tap, pound, rap, hammer► see thesaurus at hit1 (1)2[intransitive, transitive] to hit someone or something with a quick hard hit, so that he, she, or it moves or falls down: The ball was knocked loose, out of his hands. A car knocked into a pole in the parking lot.3knock somebody unconscious to hit someone so hard that s/he becomes unconsciousSPOKEN PHRASES4knock it off used in order to tell someone to stop doing something because it is annoying you5knock some sense into somebody to make someone learn to behave in a more sensible way: Maybe getting arrested will knock some sense into him.6knock on wood an expression that is used after a statement about something good, in order to prevent your luck from becoming bad: I haven’t had a cold all winter, knock on wood.7[transitive] to criticize someone or something, especially in an unfair or annoying way: The mayor took every opportunity to knock his opponent.THESAURUScriticize, attack, find fault with, be disparaging about somebody/something► see thesaurus at criticizeknock back phrasal verb informal to drink a large amount of alcohol very quickly: He knocked back a few beers.knock down phrasal verb1to hit or push someone so that s/he falls to the ground: The horse knocked Laura down while she was cleaning the stable.2to destroy a building or structure: My elementary school was knocked down so a mall could be built.3informal to reduce the price of something: The new stove we bought was knocked down from $800 to $550.knock off phrasal verb informal1to stop working: We decided to knock off around 3.2knock something ↔ off to reduce the price of something by a particular amount: I got him to knock $10 off the regular price.knock out phrasal verb1knock somebody ↔ out to make someone become unconscious: He knocked out his opponent in the fifth round.2knock somebody/something ↔ out to defeat a person or team in a competition so that he, she, or it cannot continue to take part in the competition: Indiana knocked Kentucky out of the tournament.3knock yourself out informal to work very hard in order to do something well, especially so that you are very tired when you finish: He’s been knocking himself out trying to find a job.knock over phrasal verb to hit or push someone or something so that he, she, or it falls down: Scott knocked the lamp over.
1 [intransitive] to hit a door or window with your closed hand in order to attract the attention of the people inside: I’ve been knocking at/on the door for five minutes.THESAURUShit, bang, tap, pound, rap, hammer► see thesaurus at hit1 (1)2[intransitive, transitive] to hit someone or something with a quick hard hit, so that he, she, or it moves or falls down: The ball was knocked loose, out of his hands. A car knocked into a pole in the parking lot.3knock somebody unconscious to hit someone so hard that s/he becomes unconsciousSPOKEN PHRASES4knock it off used in order to tell someone to stop doing something because it is annoying you5knock some sense into somebody to make someone learn to behave in a more sensible way: Maybe getting arrested will knock some sense into him.6knock on wood an expression that is used after a statement about something good, in order to prevent your luck from becoming bad: I haven’t had a cold all winter, knock on wood.7[transitive] to criticize someone or something, especially in an unfair or annoying way: The mayor took every opportunity to knock his opponent.THESAURUScriticize, attack, find fault with, be disparaging about somebody/something► see thesaurus at criticizeknock back phrasal verb informal to drink a large amount of alcohol very quickly: He knocked back a few beers.knock down phrasal verb1to hit or push someone so that s/he falls to the ground: The horse knocked Laura down while she was cleaning the stable.2to destroy a building or structure: My elementary school was knocked down so a mall could be built.3informal to reduce the price of something: The new stove we bought was knocked down from $800 to $550.knock off phrasal verb informal1to stop working: We decided to knock off around 3.2knock something ↔ off to reduce the price of something by a particular amount: I got him to knock $10 off the regular price.knock out phrasal verb1knock somebody ↔ out to make someone become unconscious: He knocked out his opponent in the fifth round.2knock somebody/something ↔ out to defeat a person or team in a competition so that he, she, or it cannot continue to take part in the competition: Indiana knocked Kentucky out of the tournament.3knock yourself out informal to work very hard in order to do something well, especially so that you are very tired when you finish: He’s been knocking himself out trying to find a job.knock over phrasal verb to hit or push someone or something so that he, she, or it falls down: Scott knocked the lamp over.
