Definition of "Crack" :

noun: the act of cracking something

noun: a usually brief attempt

"He took a crack at it."

noun: a purified and potent form of cocaine that is smoked rather than snorted; highly addictive

noun: a narrow opening

"He opened the window a crack."

noun: a blemish resulting from a break without complete separation of the parts

"There was a crack in the mirror."

noun: witty remark

noun: a sudden sharp noise

"The crack of a whip."

noun: a long narrow opening

noun: a long narrow depression in a surface

noun: a chance to do something

verb: break into simpler molecules by means of heat

"The petroleum cracked."

verb: reduce (petroleum) to a simpler compound by cracking

verb: become fractured; break or crack on the surface only

"The glass cracked when it was heated."

verb: cause to become cracked

"Heat and light cracked the back of the leather chair."

verb: break suddenly and abruptly, as under tension

verb: break partially but keep its integrity

"The glass cracked."

verb: pass through (a barrier)

"Registrations cracked through the 30,000 mark in the county."

verb: tell spontaneously

"Crack a joke."

verb: hit forcefully; deal a hard blow, making a cracking noise

"The teacher cracked him across the face with a ruler."

verb: suffer a nervous breakdown

verb: make a sharp sound

verb: make a very sharp explosive sound

"His gun cracked."

verb: gain unauthorized access computers with malicious intentions

"She cracked my password."

adjective: of the highest quality

"A crack shot."