1. something that is bound to happen will almost certainlyhappen

   bound to:

   If you have problems at home, it’s bound to affect your work.

   The kids are out late, so of course she’s bound to worry.

   ..
2. having an obligation to do something because of a law, promise, etc.

   By signing the contract you agree to be bound by its terms.

   be bound by something to do something:

   If her patientthreatens to kill someone, she is bound by law to inform the police.

   ..

   1. feeling that you should do something because you are expected to, or because it is morallyright, even if you do not reallywant to do it

      be/feel bound to do something:

      We felt bound to tell her that her son had been takingdrugs.

      duty/honor bound:

      reporters who feelhonor bound to protect their sources of information

      ..
3. a bound book has a leather, cloth, or papercover

   bound in:

   an oldbook of poems, bound in darkleather

   ..

The definition of bound is destined to happen or tied or secured physically or emotionally. An example of bound is an accident occurring if someone continuously. Dune 2000 pc.