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