a noise like the sound of something being crushed:
The only sound was the crunch of tyres on gravel.
2 [countable, singular] American English
a difficult situation caused by a lack of something, especially money or time:
Three new teachers were hired to help ease the crunch.
cash/budget/financial etc crunch
Cost cutting had enabled the organization to survive a previous cash crunch.
3 also crunch time American English
an important time, especially one when a difficult decision has to be made:
The crunch came when my bank asked for my credit card back.
When it came to the crunch, she couldn't agree to marry him.
an exercise in which you lie on your back and lift your head and shoulders off the ground to make your stomach muscles strong [= sit-up]