Definition: Those areas outside the course from which play is not allowed, or any area designated as out of bounds by the committee.
Out of bounds will be marked in some way - often by the use of stakes or some barrier (a fenceline, for example). Items used to designate OB are not considered obstructions, are considered to be fixed, and therefore cannot be removed in order to play.
In all cases, the innermost portion of whatever is designating OB is itself considered out of bounds. For example, if stakes are used to mark OB, then the inside of the stake is where OB begins; if a line is on the ground, then the line itself is considered OB.
A ball is considered out of bounds when all of it is outside the boundaries.
In the rulebook, see Rule 27.
Also Known As: OB, O.B.
