A man knocks on a door.
- The definition of a knock is a rattling sound that an engine makes when there are ignition problems, or is a sound made by hitting, colliding with or tapping on something.
- When your ignition is not working properly and your cars engine starts to make a clanging sound that causes you to take it to the mechanic, this is an example of when you have a knock in the engine.
- A sound made when someone taps on a door to be let in is an example of a knock.
- When you bang your elbow on the door, this is an example of a knock to the elbow.
- Knock is defined as to rap on a door, or to hit something, or to criticize someone or something.
- When you use your knuckles to tap on a door so that the people inside the house will hear you and come and open the door, this is an example of when you knock.
- When you bang your elbow into a door, this is an example of when you knock your elbow into the door.
- When you tip over a glass of water, this is an example of when you knock over the water.
- When you say that everyone who watches TV is stupid, this is an example of when you knock TV watchers.
- to strike a blow or blows with the fist or some hard object; esp., to rap on a door
- to bump; collide; clash
- to make a thumping, pounding, or rattling noise: said of an engine, etc.
- Informal to find fault; criticize adversely
- in gin rummy, to end a deal by exposing one's hand and showing a surplus of not more than ten points in unmatched cards
Origin of knockMiddle English knokken from Old English cnocian, akin to Old Norse knoka, Middle High German knochen, to press from echoic base from source knack
- to hit; strike
- to make by hitting or striking: to knock a hole in a wall
- Informal to find fault with; criticize adversely
- the act of knocking
- a hit; sharp or resounding blow; rap, as on a door
- a thumping or rattling noise in an engine, etc., as because of faulty combustion
- Informal an adverse criticism
- Informal a misfortune or trouble: the school of hard knocks
- to wander about; roam
- to treat roughly
- to hit so as to cause to fall
- to take apart for convenience in shipping
- to sell at auction
- to indicate the sale of (an article) at an auction, as by a blow of the auctioneer's hammer
- Slang to earn as pay
knock it off!
- to stop working
- to leave off (work)
- Informal to deduct
- Informal to do; accomplish
- Slang to kill, overcome, etc.
- Slang to make a knockoff of
knock oneself out
- Boxing to defeat (an opponent) by knocking to the ground so that it is not possible to rise before an official count of ten
- to make unconscious
- to make exhausted; tire out
- to defeat, destroy, etc.
- Informal to do; make; specif., to compose or write casually or with careless haste
- Slang to overwhelm with excited delight; thrill
knock out of the box
Origin of knockin allusion to the pitcher's box, the area formerly marked around the pitching rubberSlang, Baseball to make so many hits against (an opposing pitcher) as to cause the pitcher's removal
- to cause to collide
- to make or compose hastily or crudely
- Brit., Informal
- to tire out; exhaust
- to wake (someone), as by knocking at the door
- Slang to make pregnant
verbknocked, knock·ing, knocks
- To strike with a hard blow: knocked him on the head.
- To affect in a specified way by striking hard: knocked the mugger senseless.
- To cause to be displaced or unengaged; force: a wind that knocked the tower over; a blunder that knocked him out of the job.
- To cause to collide: I knocked my head on a low beam.
- To produce by hitting or striking: knocked a hole in the wall.
- Informal To find fault with; criticize: Don't knock the food; it's free.
- To strike a sharp audible blow or series of blows, as on a door.
- To collide with something: knocked into the table.
- To make a pounding or clanking noise: The car engine is knocking.
- An instance of striking or colliding.
- The sound of a sharp blow on a hard surface.
- A pounding or clanking noise made by an engine, often as a result of faulty fuel combustion. Also called ping .
- Slang A cutting, often petty criticism.
Origin of knockMiddle English knokken from Old English cnocian
- An abrupt rapping sound, as from an impact of a hard object against wood
- I heard a knock on my door.
- An impact.
- He took a knock on the head.
- (figuratively) criticism
- (cricket) a batsman's innings.
- He played a slow but sure knock of 35.
- (automotive) Preignition, a type of abnormal combustion occurring in spark ignition engines caused by self-ignition or the characteristic knocking sound associated with it.
(third-person singular simple present knocks, present participle knocking, simple past and past participle knocked)
- (intransitive, dated) To rap one's knuckles against something, especially wood.
- Knock on the door and find out if they're home.
- (dated) To strike for admittance; to rap upon, as a door.
- (intransitive, dated) To bump or impact.
- I knocked against the table and bruised my leg.
- I accidentally knocked my drink off the bar.
- (colloquial) To denigrate, undervalue.
- Don't knock it until you've tried it.
- (soccer) To pass, kick a ball towards another player.
Akin to Old Norse knoka (compare Swedish knocka, Danish knuge, to hug) and Middle High German knochen, to hit.