Noun
1. a long narrow opening
2. a narrow opening;
"he opened the window a crack"3. a long narrow depression in a surface
4. a sudden sharp noise;
"the crack of a whip""he heard the cracking of the ice""he can hear the snap of a twig"5. a chance to do something;
"he wanted a shot at the champion"6. witty remark
7. a blemish resulting from a break without complete separation of the parts;
"there was a crack in the mirror"8. a purified and potent form of cocaine that is smoked rather than snorted
9. a usually brief attempt;
"he took a crack at it""I gave it a whirl"10. the act of cracking something
Verb
1. become fractured; break or crack on the surface only;
"The glass cracked when it was heated"2. make a very sharp explosive sound;
"His gun cracked"3. make a sharp sound;
"his fingers snapped"4. hit forcefully; deal a hard blow, making a cracking noise;
"The teacher cracked him across the face with a ruler"5. pass through (a barrier);
"Registrations cracked through the 30,000 mark in the county"6. break partially but keep its integrity;
"The glass cracked"7. break suddenly and abruptly, as under tension;
"The rope snapped"8. suffer a nervous breakdown
9. tell spontaneously;
"crack a joke"10. cause to become cracked;
"heat and light cracked the back of the leather chair"11. reduce (petroleum) to a simpler compound by cracking
12. break into simpler molecules by means of heat;
"The petroleum cracked"