: 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 go or travel at good speed
—usually used with on
- The steamboat cracked on.
: to break so that fissures appear on the surface
: to break with a sudden sharp sound
: to tell especially suddenly or strikingly
: to strike with a sharp noise : rap
- then cracks him over the head
- cracked a two-run homer in the eighth
4 a (1)
: 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
: 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
7 a (1)
: 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.