crack
noun
a long narrow opening
a narrow opening
“he opened the window a crack”
Synonymsgapa long narrow depression in a surface
a sudden sharp noise
“the crack of a whip”
“he heard the cracking of the ice”
a chance to do something
“he wanted a shot at the champion”
Synonymsshotwitty remark
a blemish resulting from a break without complete separation of the parts
“there was a crack in the mirror”
a purified and potent form of cocaine that is smoked rather than snorted; highly addictive
a usually brief attempt
“he took a crack at it”
“I gave it a whirl”
the act of cracking something
verb
become fractured; break or crack on the surface only
“The glass cracked when it was heated”
make a very sharp explosive sound
“His gun cracked”
make a sharp sound
“his fingers snapped”
Synonymssnaphit forcefully; deal a hard blow, making a cracking noise
“The teacher cracked him across the face with a ruler”
pass through (a barrier)
“Registrations cracked through the 30,000 mark in the county”
Synonymsbreak throughbreak partially but keep its integrity
“The glass cracked”
break suddenly and abruptly, as under tension
“The pipe snapped”
Synonymssnapgain unauthorized access computers with malicious intentions
“she cracked my password”
“crack a safe”
suffer a nervous breakdown
tell spontaneously
“crack a joke”
cause to become cracked
“heat and light cracked the back of the leather chair”
reduce (petroleum) to a simpler compound by cracking
break into simpler molecules by means of heat
“The petroleum cracked”
adjective
of the highest quality
“an ace reporter”
“a crack shot”
Source: WordNet 3.1, Princeton University