Co je crack?

To change sharply in pitch or timbre, as from hoarseness or emotion. Used of the voice.
To break down; fail: The defendant's composure finally began to crack.
To have a mental or physical breakdown: cracked under the pressure.
To move or go rapidly: was cracking along at 70 miles an hour.
Chemistry To break into simpler molecules by means of heat.
To cause to make a sharp snapping sound.
To cause to break without complete separation of parts: cracked the glass.
To break with a sharp snapping sound. See Synonyms at break.
To crush (corn or wheat, for example) into small pieces.
To open to a slight extent: cracked the window to let in some air.
To strike with a sudden sharp sound.
Informal To break open or into: crack a safe.
Informal To open up for use or consumption: crack a book; cracked a beer.
Informal To break through (an obstacle) in order to win acceptance or acknowledgement: finally cracked the "men-only” rule at the club.
To discover the solution to, especially after considerable effort: crack a code.
To cause (the voice) to crack.
Informal To tell (a joke), especially on impulse or in an effective manner.
To cause to have a mental or physical breakdown.
To impair or destroy: Their rude remarks cracked his equanimity.
To reduce (petroleum) to simpler compounds by cracking.
A sharp snapping sound, such as the report of a firearm.
A partial split or break; a fissure.

crack: význam a definice