: to make a very sharp explosive sound
The whip cracks through the air.
: to break, split, or snap apart
The statue cracked when she dropped it.
: to lose control or effectiveness under pressure
—often used with up The stress was so great that she started to crack up.
: to fail in tone
His voice cracked.
: to go or travel at good speed
—usually used with on The steamboat cracked on.
: to break so that fissures appear on the surface
crack a mirror
: to break with a sudden sharp sound
: to tell especially suddenly or strikingly
crack a joke
: to strike with a sharp noise : rap
then cracks him over the head cracked a two-run homer in the eighth
: to open (something, such as a bottle) for drinking
: to open (a book) for studying
: to puzzle out and expose, solve, or reveal the mystery of
crack a code
: to break into
crack a safe
: to open slightly
crack the throttle
: to break through (something, such as a barrier) so as to gain acceptance or recognition
… on track to crack Hollywood after landing a big screen role.— Ed Gleave and Peter Dyke
: to show or begin showing (a smile) especially reluctantly or uncharacteristically
: to impair seriously or irreparably : wreck
crack an opponent's courage
: to destroy the tone of (a voice)
: disorder, craze
Worry had cracked his otherwise cheerful disposition.
: to interrupt sharply or abruptly
The criticism cracked our complacency.
: to cause to make a sharp noise
cracks his knuckles
: to subject (hydrocarbons) to cracking
: to produce by cracking
: to break up (chemical compounds) into simpler compounds by means of heat
crack the whip
: to adopt or apply an authoritative, tyrannical, or threatening approach or policy (as in demanding harder work from employees)
The team needs a coach who isn't afraid to crack the whip.
: to make a wisecrack
The comedian often cracked wise about prominent politicians.
: a loud roll or peal
a crack of thunder
: a sudden sharp noise
the crack of rifle fire
: a sharp witty remark : quip
: a narrow break : fissure
a crack in the ice
: a narrow opening
Leave the door open a crack. cracks between floorboards
—used figuratively in phrases like fall through the cracks to describe one that has been improperly or inadvertently ignored or left out a player who fell through the cracks in the college draftChildren slipping through the cracks of available youth services.
: a weakness or flaw caused by decay, age, or deficiency : unsoundness
: a broken tone of the voice
: a sharp resounding blow
gave him a crack on the head
: an attempt or opportunity to do something
her first crack at writing a novel got first crack at the job opening
or crack cocaine
: a potent form of cocaine that is obtained by treating the hydrochloride of cocaine with sodium bicarbonate to create small chips used illicitly for smoking
: of superior excellence or ability
a crack marksman