bound-n; 4 Senses

Sense Number 1: a border region, line of demarcation

Commentary: BOUND[+location][+region][+border]
NOTE: usually occurs in the plural

The ball landed in bounds.
That tribe considers the bounds of the ancient forest to be the border of their land.
No trash may dumped at sea within the thirty-mile bound of shore.
The referee said the player caught the ball out of bounds.

WordNet 3.0 Sense Numbers: 1, 2

Sense Number 2: a limit, a constraint

Commentary: BOUND[+quantity][+extent][+limit]

Their joy knew no bounds.
Traveling back in time may be beyond the bounds of possibility.
If for every x in set S, x is less than or equal to a, then a is an upper bound of S. (no element in S exceeds a)
Sally's kitchen was out of bounds to us on Thanksgiving. (idiomatic extension)

WordNet 3.0 Sense Numbers: 3

Sense Number 3: a leap or jump

Commentary: BOUND[+action][+leap]

John ran up the steps in two effortless bounds.
The rabbit took a bound to the left and jumped into a hole.

WordNet 3.0 Sense Numbers: 4

Sense Number 4: none of the above

Commentary: Automatically generated NOTA sense (bbn)