crack

(noun) a long narrow opening. Synonyms: cleft, crevice, fissure, scissure.

(noun) a narrow opening. Synonyms: gap. Examples: "He opened the window a crack."

(noun) a long narrow depression in a surface. Synonyms: crevice, cranny, fissure, chap.

(noun) a sudden sharp noise. Synonyms: cracking, snap. Examples: "The crack of a whip." "He heard the cracking of the ice." "He can hear the snap of a twig."

(noun) a chance to do something. Synonyms: shot. Examples: "He wanted a shot at the champion."

(noun) witty remark. Synonyms: wisecrack, sally, quip.

(noun) a blemish resulting from a break without complete separation of the parts. Examples: "There was a crack in the mirror."

(noun) a purified and potent form of cocaine that is smoked rather than snorted; highly addictive. Synonyms: crack cocaine, tornado.

(noun) a usually brief attempt. Synonyms: fling, go, pass, whirl, offer. Examples: "He took a crack at it." "I gave it a whirl."

(noun) the act of cracking something. Synonyms: fracture, cracking.

(verb) become fractured; break or crack on the surface only. Synonyms: check, break. Examples: "The glass cracked when it was heated."

(verb) make a very sharp explosive sound. Examples: "His gun cracked."

(verb) make a sharp sound. Synonyms: snap. Examples: "His fingers snapped."

(verb) hit forcefully; deal a hard blow, making a cracking noise. Examples: "The teacher cracked him across the face with a ruler."

(verb) pass through (a barrier). Synonyms: break through. Examples: "Registrations cracked through the 30,000 mark in the county."

(verb) break partially but keep its integrity. Examples: "The glass cracked."

(verb) break suddenly and abruptly, as under tension. Synonyms: snap. Examples: "The pipe snapped."

(verb) gain unauthorized access computers with malicious intentions. Examples: "She cracked my password." "Crack a safe."

(verb) suffer a nervous breakdown. Synonyms: crack up, crock up, break up, collapse.

(verb) tell spontaneously. Examples: "Crack a joke."

(verb) cause to become cracked. Examples: "Heat and light cracked the back of the leather chair."

(verb) reduce (petroleum) to a simpler compound by cracking.

(verb) break into simpler molecules by means of heat. Examples: "The petroleum cracked."

(adj) of the highest quality. Synonyms: ace, A-one, first-rate, super, tiptop, topnotch, top-notch, tops(predicate). Examples: "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."