"crack" in the noun sense
1. crack, cleft, crevice, fissure, scissure
a long narrow opening
2. gap, crack
a narrow opening
"he opened the window a crack"
3. crevice, cranny, crack, fissure, chap
a long narrow depression in a surface
4. crack, cracking, snap
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. shot, crack
a chance to do something
"he wanted a shot at the champion"
6. wisecrack, crack, sally, quip
a blemish resulting from a break without complete separation of the parts
"there was a crack in the mirror"
8. crack, crack cocaine, tornado
a purified and potent form of cocaine that is smoked rather than snorted highly addictive
9. crack, fling, go, pass, whirl, offer
a usually brief attempt
"he took a crack at it"
"I gave it a whirl"
10. fracture, crack, cracking
the act of cracking something
"crack" in the verb sense
1. crack, check, break
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"
3. snap, crack
make a sharp sound
"his fingers snapped"
hit forcefully deal a hard blow, making a cracking noise
"The teacher cracked him across the face with a ruler"
5. break through, crack
pass through (a barrier
"Registrations cracked through the 30,000 mark in the county"
break partially but keep its integrity
"The glass cracked"
7. snap, crack
break suddenly and abruptly, as under tension
"The pipe snapped"
gain unauthorized access computers with malicious intentions
"she cracked my password"
"crack a safe"
9. crack up, crack, crock up, break up, collapse
suffer a nervous breakdown
"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"
"crack" in the adjective sense
1. ace, A-one, crack, first-rate, super, tiptop, topnotch, top-notch, tops
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"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
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