1 [usually plural]MH
one of a pair of long sticks that you put under your arms to help you walk when you have hurt your leg
on crutches (=use crutches)
I was on crutches for three months after the operation.
something that gives someone support or help, especially something that is not really good for them:
As things got worse at work, he began to use alcohol as a crutch.
3 British EnglishHBH
the part of your body between the tops of your legs [= crotch]