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English definition of “crack”

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crack

verb uk   /kræk/ us  

crack verb (BREAK)

B2 [T or I] to break something so that it does not separate, but very thin lines appear on its surface, or to become broken in this way: A stone hit the window and cracked the glass. I cracked my tooth as I fell. The walls cracked and the roof collapsed in the earthquake. [I] informal to become mentally and physically weak: Stress and overwork are causing teachers to crack (up). [I] informal to fail as a result of problems: Their relationship began to crack (up) after their child died. [I] If someone cracks, that person begins to feel weak and agrees that they have been defeated: He cracked during questioning and told us where to find the stolen goods.
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crack verb (GET INTO)

[T] to break something open, especially in order to reach or use what is inside: Crack three eggs into a bowl and mix them together. He cracked (open) the nuts with his hands. [T] ( also crack into sth) to get into someone else's computer system without permission and get information or do something illegal [T] informal to copy computer programs or recorded material illegally

crack verb (FIND ANSWER)

[T] to find a solution to a problem: They cracked the code and read the secret message. UK I've been trying to solve this problem all week, but I still haven't cracked it.

crack verb (HIT)

[I or T, usually + adv/prep] to hit something or someone: I cracked my head on/against the door. They cracked him over the head with a baseball bat.

crack verb (MAKE SOUND)

[I or T] to make a sudden, short noise, or to cause something to make this noise: The whip cracked over the horses' heads. He's always cracking his knuckles (= pulling the joints of his fingers to make a noise). [I] If a voice cracks, its sound changes because the person is upset: Her voice cracked with emotion as she told the story.

crack verb (MAKE JOKE)

C1 [T] to make a joke or clever remark: He's always cracking jokes.

crack

noun uk   /kræk/ us  

crack noun (NARROW SPACE)

C2 [C] a very narrow space between parts of something: Cracks had appeared in the dry ground. We peered through the crack in the floorboards. figurative Cracks began to show in his façade of self-confidence.(just) a crack so that there is a very small space: She opened the door just a crack to listen to the conversation.
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crack noun (SOUND)

[C] a sudden loud sound: the crack of a rifle/whip/breaking branch

crack noun (ATTEMPT)

[C usually singular] informal an attempt: It was her first crack at beating the record. It's not something I've done before, but I'll have/ ( US take) a crack at it.

crack noun (DRUG)

[U] ( also crack cocaine) slang a powerful form of the drug cocaine : Several kilos of crack were found in her luggage. a crack addict

crack noun (ENJOYABLE TIME)

[U] →  craic

crack noun (IN COMPUTER SYSTEM)

[C] informal a method of getting into someone else's computer system: Find cracks for your shareware programs.

crack noun (JOKE)

[C] a wisecrack

crack

adjective [before noun] uk   /kræk/ us  
excellent, or of the highest quality: a crack regiment crack troops
(Definition of crack from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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