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To break or cause to break without a complete separation of the parts
“The council told him the bays would then overlap the paving stones, which would crack under the weight.”
To succumb or give way to pressure or strain (literally or figuratively)
“What looks like a frozen river can quickly crack under the weight of a sled.”
To make, or cause to make, a sudden sharp or explosive sound
“A quiver in the air, a gust of wind, a flash of lightning, and then thunder would crack through the sky.”
To decipher or find a solution to
“Most new garage door openers have built-in security codes that are hard for crooks to crack.”
To go, or cause to go, insane or as if insane
“He began to crack after being shuffled between a cell and the interrogation room for two days without cigarettes or alcohol.”
To hit very hard
“She raised her arm in a turbulent gesture that made Yossarian fear she was going to crack him in the face again with her great pocketbook.”
To shatter or break into small pieces
To become mentally worked up or unhinged
To cut or sever something apart
To pierce (a cask) to draw out liquid
To knock or cut pieces off (a hard material)
To make a fizzing, popping sound
To move or cause to move suddenly and rapidly
Speak in a joking way
To break into something closed or locked
(computing) To manipulate data or information with a computer or software
Persuade
To smile in a scornful or deprecating manner
To reveal or disclose a fact or information
(of the skin) To become cracked, rough, or sore, especially through exposure to wind or cold weather
To injure or damage, figuratively or physically by striking
To reveal secret or confidential information
To gain access or entry into
To insert or introduce in a stealthy way
To smile broadly
Say something in answer to a remark, typically in a sharp, angry, or witty manner
To speak or say something
To damage or disfigure a surface by creating a hole or mark in it
A split in a surface which has not completely broken apart
“Rays from the afternoon sun shine through a crack in the boulders to illuminate a spiral petroglyph.”
A flaw or imperfection
“Anya is watching him, her strange luminescent eyes trolling over every inch of him, searching for a crack in his façade.”
An attempt or opportunity to achieve something
“I decided to give the young, gung-ho writer a crack at writing my biography.”
A joke, typically a critical or unkind one
“The lifeguard made a crack about her ragged armpits and cellulite thighs as she sprang off the diving board.”
A sudden sharp or explosive noise
“The explosive crack of a bullwhip can frighten cattle into a pen, and even keep lions and tigers at bay.”
A hit, strike or blow, especially one that is audible
“She gave the thief a crack over the head with her rolling pin.”
An eccentric or unusual person
“Alex was labeled a crack after making claims about frogs having dysfunctional amorous tendencies due to the presence of mysterious chemicals.”
A lively party involving dancing and drinking
A stimulant narcotic, derived from cultivated plants of the genus Erythroxylum, in the form of a white powder that users generally self-administer by insufflation through the nose
A harmless piece of mischief
Crack cocaine
The top of the buttocks exposed when trousers are worn too low, or when the wearer bends over
An informal conversation
An ambiguity or inadequacy in the law or a set of rules
A long deep track made by the repeated passage of the wheels of vehicles
A feeble hissing or spluttering sound
Contemptuous ridicule or mockery
An incidental remark, especially (law) in a court's judgment that is not essential to the disposition of the case
An opportunity to achieve something
A very short period of time
A sudden occurrence of something unwelcome, such as war or disease
One's chance to speak during a discussion
Very good or skillful
“Could the Guardian's crack team of theatre experts give the show an instant makeover and turn its fortunes around?”
Selected as the best or mos | 
