What is the meaning of the word "bound"?

Definitions:

bound by an oath adjective
- a bound official
confined by bonds adjective
- bound and gagged hostages
headed or intending to head in a certain direction adjective
- often used as a combining form as in `collegebound students'
the greatest possible degree of something noun
- What they did was beyond the bounds of acceptable behavior.
to form the boundary of verb
- The fence bounds my farmland.
to move forward by leaps and bounds verb
- The horse bounded across the meadow.
to place limits on extent or access verb
- We bound the arena so that it only extends ten miles in all directions.