Please select the first letter from the word or phrase your searching from the links below.
Below is a list of golf related words and terms along with their most common definitions. Some definitions also contain the USGA’s definition. You can find a more complete list of the USGA Rules and Definitions at www.rulesofgolf.com.
You can help support this great game as well as get insider information by joining the USGA at www.usga.org.
What’s your magic number, 99, 89, 79 or 69?
Do you know how to get there?
Learn how with
Do you want to improve your game? By using statistical analysis mygolfcoach.com can show you the areas you need to work on first.





Obstruction
Any artificial object that has been left or placed on the course with the exception of course boundary markers and constructed roads and paths.
Off Center
When the club strikes the ball outside the center of the club face.
Off-Green Putting
When a player elects to putt from off the green rather than chip.
Offset
The distance from the forward most point of the hosel to the leading edge of the blade. Offset will help a player to align the club face with the target, reducing a slice, and may produce higher ball flight.
One-Piece Takeaway
Sometimes called the "modern" takeaway, it describes the beginning of the backswing when the hands, arms and wrists move away from the ball, maintaining the same relationship they had at address.
Open Clubface
When, either at address or during the swing, the heel of the clubhead is leading the toe, causing the clubface to point to the side of the target.
Open Grip
Also referred to as a weak grip, it is when the hands are turned toward the target on the club.
Open Stance
When the forward foot is pulled back farther from the target line than the rear or right foot. This stance generally helps promote a left-to-right ball flight.
Open-to-Closed
A description of the movement of the clubface when a player fans it open on the backswing and then closes it at impact.
Out of Bounds
The area outside of the course in which play is prohibited. A player is penalized stroke and distance. That is he must replay the shot with a penalty of one stroke.
Outside-to-In
A description of a swing path when the clubhead approaches the ball from outside the target line and then continues to the inside of that line following impact.
Overclub
To pick a club that would, under normal conditions, usually make the ball fly further than the required distance. A player may elect to overclub into a strong wind.
Overlapping Grip
As used by a right-handed player having the little finger of the right hand overlapping the space between the forefinger and second finger of the left hand. The opposite for a left-handed player.
Oversize Iron Head
Any iron head larger 43 millimeters and a blade length of 75 mm.
Oversize Wood Head
A wood head with volume greater than 200 cc's.
Golf Instruction Newsletter