What is the meaning of crack?

noun

• A long narrow opening.
  • synonyms: cleft, crevice, fissure, scissure
• A narrow opening.
  • usage: "he opened the window a crack"
  • synonyms: gap
• A long narrow depression in a surface.
  • synonyms: crevice, cranny, fissure, chap
• A sudden sharp noise.
  • usage: "the crack of a whip"; "he heard the cracking of the ice"; "he can hear the snap of a twig"
  • synonyms: cracking, snap
• A chance to do something.
  • usage: "he wanted a shot at the champion"
  • synonyms: shot
• Witty remark.
  • synonyms: wisecrack, sally, quip
• A blemish resulting from a break without complete separation of the parts.
  • usage: "there was a crack in the mirror"
• A purified and potent form of cocaine that is smoked rather than snorted; highly addictive.
  • synonyms: crack cocaine, tornado
• A usually brief attempt.
  • usage: "he took a crack at it"; "I gave it a whirl"
  • synonyms: fling, go, pass, whirl, offer
• The act of cracking something.
  • synonyms: fracture, cracking

verb

• Become fractured; break or crack on the surface only.
  • usage: "The glass cracked when it was heated"
  • synonyms: check, break
• Make a very sharp explosive sound.
  • usage: "His gun cracked"
• Make a sharp sound.
  • usage: "his fingers snapped"
  • synonyms: snap
• Hit forcefully; deal a hard blow, making a cracking noise.
  • usage: "The teacher cracked him across the face with a ruler"
• Pass through (a barrier. )
  • usage: "Registrations cracked through the 30, 000 mark in the county"
  • synonyms: break through
• Break partially but keep its integrity.
  • usage: "The glass cracked"
• Break suddenly and abruptly, as under tension.
  • usage: "The pipe snapped"
  • synonyms: snap
• Gain unauthorized access computers with malicious intentions.
  • usage: "she cracked my password"; "crack a safe"
• Suffer a nervous breakdown.
  • synonyms: crack up, crock up, break up, collapse
• Tell spontaneously.
  • usage: "crack a joke"
• Cause to become cracked.
  • usage: "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.
  • usage: "The petroleum cracked"

adjective

• Of the highest quality.
  • usage: "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"
  • synonyms: ace, A-one, first-rate, super, tiptop, topnotch, top-notch, tops