(n) the act of cracking something
(n) a usually brief attempt; "he took a crack at it"; "I gave it a whirl"
(n) a purified and potent form of cocaine that is smoked rather than snorted
(n) a narrow opening; "he opened the window a crack"
(n) a blemish resulting from a break without complete separation of the parts; "there was a crack in the mirror"
(n) witty remark
(n) a sudden sharp noise; "the crack of a whip"; "he heard the cracking of the ice"; "he can hear the snap of a twig"
(n) a long narrow opening
(n) a long narrow depression in a surface
(n) a chance to do something; "he wanted a shot at the champion"
(v) break into simpler molecules by means of heat; "The petroleum cracked"
(v) reduce (petroleum) to a simpler compound by cracking
(v) become fractured; break or crack on the surface only; "The glass cracked when it was heated"
(v) cause to become cracked; "heat and light cracked the back of the leather chair"
(v) break suddenly and abruptly, as under tension; "The rope snapped"
(v) break partially but keep its integrity; "The glass cracked"
(v) pass through (a barrier); "Registrations cracked through the 30,000 mark in the county"
(v) tell spontaneously; "crack a joke"
(v) hit forcefully; deal a hard blow, making a cracking noise; "The teacher cracked him across the face with a ruler"
(v) suffer a nervous breakdown
(v) make a sharp sound; "his fingers snapped"
(v) make a very sharp explosive sound; "His gun cracked"
(s) of the highest quality; "an ace reporter"; "a crack shot"; "a first-rate golfer"; "a super party"; "played top-notch tennis"; "an athlete in tiptop condition"; "she is absolutely tops"
