[ nok ]
/ nɒk /
verb (used without object)
to strike a sounding blow with the fist, knuckles, or anything hard, especially on a door, window, or the like, as in seeking admittance, calling attention, or giving a signal: to knock on the door before entering.
to strike in collision; bump: He knocked into a table.
to make a pounding noise: The engine of our car is knocking badly.
Informal. to engage in trivial or carping criticism; find fault.
Cards. to end a game, as in gin rummy, by laying down a hand in which those cards not included in sets total less than a specific amount.
verb (used with object)
to give a sounding or forcible blow to; hit; strike; beat.
to drive, force, or render by a blow or blows: to knock a man senseless.
to make by striking a blow or blows: to knock a hole in the wall.
to strike (a thing) against something else.
Informal. to criticize, especially in a carping manner: He's always knocking everything.
British Slang. to astound; impress greatly.
an act or instance of knocking.
the sound of knocking, especially a rap, as at a door.
a blow or thump.
Informal. an adverse criticism.
the noise resulting from faulty combustion or from incorrect functioning of some part of an internal-combustion engine.
Cricket. an innings.
- one of a combination of dealers who bid together, rather than against each other, at an auction, and later resell the purchases among themselves.
- an auction at which this is done.
- the sale of merchandise recently obtained by a dealer at an auction.
knock around/about, Informal.
- to wander aimlessly or idly; loaf.
- to mistreat (someone), especially physically.
- to jar; shake up.
knock back, Slang. to drink (a beverage), especially quickly and heartily: He knocked back two shots of vodka.
- to sell at auction by a blow of the hammer or to a bidder.
- to take apart or disassemble, as for facility in handling, storing, shipping, etc.
- Slang. to receive, as a salary or a scholastic grade; earn: He knocks down 30 grand a year.
- Informal. to lower the price of; reduce: to knock down end-of-season leftovers.
- Slang. to embezzle or steal (money).
- to cause (a sailing vessel) to heel, as by a gust of wind, to such a degree that it cannot right itself.
- Informal. to cease activity, especially work: to knock off at five every day.
- to stop doing something; quit: Knock it off or you'll get into a mess.
- Slang. to dispose of; finish.
- Slang. to murder; kill.
- Slang. to die.
- Slang. to get rid of; reduce.
- Slang. to disable or defeat.
- Slang. to commit a robbery at; steal from: The gang knocked off a gas station.
- Nautical Slang. to blow the head (of a sailing vessel) off the wind.
- to imitate, copy, or plagiarize: to knock off designer dresses in cheap materials.
- to defeat (an opponent) in a boxing match by striking such a blow that the opponent is unable to rise within the specified time.
- to render (a person) unconscious: Those sleeping pills knocked me out for ten hours.
- to make tired or exhausted: Christmas shopping always knocks me out.
- Informal. to produce quickly, hurriedly, or with ease: He knocks out two poems a day.
- to damage or destroy: The explosion knocked out the power for several hours.
- knock(def 28).
- to strike (someone or something) from an erect to a prone position: to knock over a lamp.
- to distress; overcome: When the announcement came we were completely knocked over.
- Slang. to rob, burglarize, or hijack: He knocked over five banks.
knock together, to make or construct in a hurry or with little attention to detail: He knocked together a couple of tables.
- Slang. to make pregnant.
- to exhaust; weary; tire.
- to damage; mar: The children knocked up the new table.
- to injure; wound: He was afraid to come home from school all knocked up again.
- British. to wake up; rouse; call: He knocked us up before dawn.
👍 - thumbs up emoji - What does the thumbs up emoji mean?Read more in this article about some frequently asked questions and fun facts related to our definitions.
9 Synonyms For “Screwing Up”We’ve all had moments where we’ve really and truly screwed something up. An epic mistake (OK, maybe not on a historic, global scale like the February 26, 2017 Oscars). But still, we’re human, and mistakes do happen. There are a lot of words to describe things going south in a hurry. We’ve gathered a few here. You’ll notice they’re all very close in definition. Maybe …
have it knocked, Slang. to be assured of success: With a government job, he thought he had it knocked.
knock out of the box, Baseball. to cause a pitcher to be removed from the box because the pitcher has permitted too many hits to be made.Also knock out.
knock the/one's socks off, Informal. to have an overwhelming effect on: The song knocked the socks off the audience.
Origin of knock
before 1000; 1890–95 for def 4; Middle English knokken, knoken (v.), Old English cnocian, cnucian; cognate with Old Norse knoka to thump, knock
Related formsknock·less, adjectivere·knock, verbun·knocked, adjectiveun·knock·ing, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for knock up (1 of 2)
verb (adverb, mainly tr)
Also: knock together informal to assemble quickly; improviseto knock up a set of shelves
British informal to waken; rouseto knock someone up early
slang to make pregnant
British informal to exhaustthe heavy work knocked him up
cricket to score (runs)
(intr) tennis squash badminton to practise or hit the ball about informally, esp before a match
a practice session at tennis, squash, or a similar game
British Dictionary definitions for knock up (2 of 2)
/ (nɒk) /
(tr) to give a blow or push to; strike
(intr) to rap sharply with the knuckles, a hard object, etc, esp to capture attentionto knock at the door
(tr) to make or force by strikingto knock a hole in the wall
(intr usually foll by against) to collide (with)
(tr) to bring into a certain condition by hitting or pushingto knock someone unconscious
(tr) informal to criticize adversely; belittleto knock someone's work
Also: pink (intr) (of an internal-combustion engine) to emit a characteristic metallic noise as a result of faulty combustion
(intr) (of a bearing, esp one in an engine) to emit a regular characteristic sound as a result of wear
British slang to have sexual intercourse with (a person)
knock a person into the middle of next week informal to hit a person with a very heavy blow
knock one's head against to have a violent or unpleasant encounter with (adverse facts or circumstances)
knock on the head
- to daze or kill (a person) by striking on the head
- effectively to prevent the further development of (a plan)
- a blow, push, or raphe gave the table a knock
- the sound so caused
the sound of knocking in an engine or bearing
informal a misfortune, rebuff, or setback
informal unfavourable criticism
informal (in cricket) an innings or a spell of batting
Word Origin for knock
Old English cnocian, of imitative origin; related to Old Norse knoka to hit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Idioms and Phrases with knock up (1 of 2)
Make pregnant, as in The young girl said she was afraid of getting knocked up. [Slang; early 1800s]
Injure or damage, as in This coffee table got all knocked up in the moving van.
Idioms and Phrases with knock up (2 of 2)
In addition to the idioms beginning with knock
- knock about
- knock back
- knock cold
- knock dead
- knock down
- knock down with a feather
- knock for a loop
- knock into a cocked hat
- knock it off
- knock off
- knock oneself out
- knock on wood
- knock out
- knock over
- knock over with a feather
- knock someone's block off
- knock someone's socks off
- knock the bottom out of
- knock the living daylights out of
- knock the socks off
- knock together
- knock up
- beat (knock) into someone's head
- beat (knock) the living daylights out of
- (knock) down to size
- (knock) off someone's feet
- school of hard knocks
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.