knock

knock [näk]

vi.

[ME knokken < OE cnocian, akin to ON knoka, MHG knochen, to press < echoic base > KNACK]

1. to strike a blow or blows with the fist or some hard object; esp., to rap on a door

2. to bump; collide; clash

3. to make a thumping, pounding, or rattling noise: said of an engine, etc.

☆ 4. Informal to find fault; criticize adversely

☆ 5. Gin Rummy to end a deal by exposing one's hand and showing a surplus of not more than ten points in unmatched cards

vt.

1. to hit; strike

2. to make by hitting or striking [to knock a hole in a wall ]

☆ 3. Informal to find fault with; criticize adversely

n.

1. the act of knocking

2. a hit; sharp or resounding blow; rap, as on a door

3. a thumping or rattling noise in an engine, etc., as because of faulty combustion

☆ 4. Informal an adverse criticism

5. Informal a misfortune or trouble [the school of hard knocks]

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knock about or knock around Informal

1. to wander about; roam

2. to treat roughly

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knock back

Informal to gulp down (an alcoholic drink)

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knock down

1. to hit so as to cause to fall

☆ 2. to take apart for convenience in shipping

3.

a) to sell at auction

b) to indicate the sale of (an article) at an auction, as by a blow of the auctioneer's hammer

4. Slang to earn as pay

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☆ knock for a loop or throw for a loop Slang

1. to punch very hard

2. to defeat or overcome

3. to shock, amaze, confuse, etc.

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☆ knock it off!

Slang stop doing that! specif., stop talking!

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knock off

1. Informal

a) to stop working

b) to leave off (work)

2. Informal to deduct

3. Informal to do; accomplish

☆ 4. Slang to kill, overcome, etc.

☆ 5. Slang to make a knockoff of

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☆ knock oneself out

to make great efforts; exhaust oneself

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knock out

1. Boxing to defeat (an opponent) by knocking to the ground so that it is not possible to rise before an official count of ten

2.

a) to make unconscious

b) to make exhausted; tire out

3. to defeat, destroy, etc.

4. Informal to do; make; specif., to compose or write casually or with careless haste

5. Slang to overwhelm with excited delight; thrill

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☆ knock out of the box

[in allusion to the pitcher's box, the area formerly marked around the pitching rubber] Baseball to make so many hits against (an opposing pitcher) as to cause the pitcher's removal

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knock over

☆ Slang to rob

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knock together

1. to cause to collide

2. to make or compose hastily or crudely

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knock up

1. [Brit. Informal]

a) to tire out; exhaust

b) to wake (someone), as by knocking at the door

☆ 2. Slang to make pregnant