knock something out Definition

knock
verb knocked, knocking

intr
1. To tap or rap with the knuckles or some object, especially on a door for admittance.

Thesaurus: rap, thump, buffet, clap, cuff, hit, punch, slap, smite, strike, beat, hit.
2. To strike and so push someone or something, especially accidentally.
3. To put someone or something into a specified condition by hitting them or it.

Example: knocked him senseless
4. To make by striking.

Example: knocked a hole in the boat
tr & intr
5. To strike, bump or bang against it or them.

Form: knock against something or someone (usually)
Form: knock on something
Form: knock into something or someone
6. colloq
To find fault with or criticize someone or something, especially unfairly.
Thesaurus: abuse, belittle, disparage, carp at, cavil at, censure, deprecate, condemn, lambaste, criticize, put down (slang), vilify.
intr
7. Said of an internal combustion engine: to make a metallic knocking sound caused by the explosion of an unburned mixture of fuel vapour and air before it is ignited by the spark. Also called pink.
intr
8. Said of machinery: to rattle or clank with a regular rhythm (sometimes a symptom of wear).
9. coarse, slang
To have sexual intercourse with someone.

noun

1. An act of knocking.
2. A tap or rap.

Thesaurus: rap, thump, whack, beat, blow, slap, smack, thump, punch, cuff, box, clip, clout.
3. A push or shove.
4. colloq
A personal misfortune, blow, setback, calamity, etc.
Thesaurus: setback, reversal, rejection, failure, defeat, criticism, condemnation, censure; Antonym: boost, praise.
5. In an internal combustion engine: a metallic knocking sound caused by the explosion of an unburned mixture of fuel vapour and air before it is ignited by the spark.
6. The sound of knocking in machinery.
7. colloq
A criticism.

Idiom: knock someone into the middle of next week

To hit them extremely hard.

To surprise them.

Idiom: knock something on the head

colloq
To put an end to it in a firm or definite manner.

Etymology: Anglo-Saxon cnucian.

Phrasal Verb: knock about or around

To wander about (a place) in a casual and aimless way; to lie about unused; to be idle.
Example: knocking about the streets
To travel about, roughing it and having varied experiences.
Example: knocked about Europe for the summer

Phrasal Verb: knock someone about or around

To treat them roughly; to hit or batter them.

Phrasal Verb: knock about with someone

To associate or go about with them.

Phrasal Verb: knock someone back

To cost them (a specified amount). 2 to surprise, dismay, or disappoint them. 3 to rebuff or reject them; to turn them down.
Example: knocked me back 500 quid

Phrasal Verb: knock something back

To eat or drink it quickly and with relish.

Phrasal Verb: knock someone down

To strike them to the ground.
Example: knocked down by a car

Phrasal Verb: knock something down

To demolish (a building).To reduce its price.
Example: knocked these down to a fiver each

Phrasal Verb: knock something down to someone

To sell (goods) to them at auction.

Phrasal Verb: knock into someone

To meet them by chance or unexpectedly.

Phrasal Verb: knock into someone or something

To collide with them.

Phrasal Verb: knock something into someone

To teach it to them forcefully.
Example: needs to have some sense knocked into him

Phrasal Verb: knock off

To finish work.
Example: We knock off at 5pm

Phrasal Verb: knock someone off

To kill them.To have sexual intercourse with them.

Phrasal Verb: knock something off

To produce it or them at speed or in quick succession, apparently quite easily.
Example: knocks off several books a year
To deduct (a certain amount).
Example: knocked off £15 for a quick sale
To rob or steal it.
Example: He knocked off 10 grand
Example: They knocked off a bank
To copy and distribute illegally.
Example: caught knocking off videos and computer games
Often in commands: to stop it
Example: Knock it off!

Phrasal Verb: knock on

To commit the foul of pushing the ball forward with the hand. See also knock-on.

Phrasal Verb: knock someone out

To make them unconscious, especially by hitting them.To make them unconscious or render them incapable of rising in the required time.To defeat them in a knockout competition.To amaze them; to impress them greatly. See also knockout.

Phrasal Verb: knock someone or something over

To collide with them or it, usually accidentally, causing them or it to fall
Example: I'm so sorry, but I've knocked over the vase of flowers.

Phrasal Verb: knock something out

To dislodge it by a blow.To make it stop functioning; to damage or destroy it.To produce something, especially if done quickly or roughly.

Phrasal Verb: knock someone sideways

To come as a severe shock to them; to devastate or disconcert them.
Example: Her death knocked him sideways

Phrasal Verb: knock something together

To make it hurriedly.

Phrasal Verb: knock up

To exchange practice shots with one's opponent before a match.

Phrasal Verb: knock someone up

To wake them by knocking.To exhaust them.To make them pregnant.

Phrasal Verb: knock something up

To make it hurriedly.To score (a number of runs).