Adjective crack has 1 sense
  1. ace, A-one, crack, first-rate, super, tiptop, topnotch, 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"
    Antonym: inferior (indirect, via superior)
,Noun crack has 10 senses
  1. crack, cleft, crevice, fissure, scissure - a long narrow opening
    --1 is a kind of opening, gap
    --1 has particulars:
     chap; chink; crevasse; fatigue crack; fault, geological fault, shift, fracture, break; rift; slit; split; vent, volcano; volcanic crater, crater
    Derived form: verb crack6
  2. gap, crack - a narrow opening; "he opened the window a crack"
    --2 is a kind of opening
    --2 has particulars: lacuna, blank; spark gap
  3. crevice, cranny, crack, fissure, chap - a long narrow depression in a surface
    --3 is a kind of depression, impression, imprint
  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"
    --4 is a kind of noise
  5. shot, crack - a chance to do something; "he wanted a shot at the champion"
    --5 is a kind of opportunity, chance
  6. wisecrack, crack, sally, quip - witty remark
    --6 is a kind of remark, comment
    Derived form: verb crack9
  7. crack - a blemish resulting from a break without complete separation of the parts; "there was a crack in the mirror"
    --7 is a kind of
    blemish, defect, mar
    --7 has particulars: craze
  8. crack, tornado - a purified and potent form of cocaine that is smoked rather than snorted
    --8 is a kind of cocaine, cocain
  9. crack, fling, go, pass, whirl, offer - a usually brief attempt; "he took a crack at it"; "I gave it a whirl"
    --9 is a kind of attempt, effort, endeavor, endeavour, try
  10. fracture, crack, cracking - the act of cracking something
    --10 is a kind of breakage, break, breaking
,Verb crack has 12 senses
  1. crack, check, break - become fractured; break or crack on the surface only; "The glass cracked when it was heated"
    --1 is one way to change
    Sample sentences:
    The glass tubes crack
    These glasses crack easily
  2. crack - make a very sharp explosive sound; "His gun cracked"
    --2 is one way to
    sound, go
    Derived forms: noun cracker4, noun cracking1
    Sample sentence:
    Something ----s
  3. snap, crack - make a sharp sound; "his fingers snapped"
    --3 is one way to sound, go
    Derived form: noun cracker5
    Sample sentences:
    Something ----s
    Somebody ----s something
  4. crack - hit forcefully; deal a hard blow, making a cracking noise; "The teacher cracked him across the face with a ruler"
    --4 is one way to
    hit
    Derived form: noun cracking2
    Sample sentence:
    The fighter managed to crack his opponent
  5. break through, crack - pass through (a barrier); "Registrations cracked through the 30,000 mark in the county"
    --5 is one way to pass, go through, go across
    Sample sentence:
    Something ----s something
  6. crack - break partially but keep its integrity; "The glass cracked"
    --6 is one way to
    crack, check, break
    Derived form: noun crack1
    Sample sentence:
    Something ----s
  7. snap, crack - break suddenly and abruptly, as under tension; "The rope snapped"
    --7 is one way to break, separate, split up, fall apart, come apart
    Sample sentences:
    Something ----s
    Somebody ----s something
    Something ----s something
  8. crack up, crack, crock up, break up, collapse - suffer a nervous breakdown
    --8 is one way to suffer, sustain, have, get
    Sample sentence:
    Somebody ----s
  9. crack - tell spontaneously; "crack a joke"
    --9 is one way to
    tell, narrate, recount, recite
    Derived form: noun crack6
    Sample sentence:
    Somebody ----s something
  10. crack - cause to become cracked; "heat and light cracked the back of the leather chair"
    --10 is one way to
    change, alter, modify
    Sample sentence:
    They crack the glass tubes
  11. crack - reduce (petroleum) to a simpler compound by cracking
    --11 is one way to
    decompose, break up, break down
    Derived form: noun cracking3
    Sample sentences:
    Somebody ----s something
    Something ----s something
  12. crack - break into simpler molecules by means of heat; "The petroleum cracked"
    --12 is one way to
    change
    Derived form: noun cracking3
    Sample sentence:
    Something ----s
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