If you're in a bind, you have been hindered by some situation. You'll find yourself in a bind if you agree to bring dessert to a party, only to realize that you're out of fruit, sugar, and chocolate chips.
The verb bind means to tie, secure, or fasten as with string or rope. When you put a Christmas tree on the top of your car, you need to bind it with twine to make sure it stays there while you drive. The past tense of bind is "bound." To bind is also to create an emotional attachment. Your love for your family binds you to them.