Grand Slam The Modern (or Professional) Grand Slam describes winning the four professional Major Championships -- the PGA Championship, the Masters and the United States and British Opens -- in a calendar year. The Career Grand Slam describes winning each of these events once in a career. Only Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus and Tiger Woods have accomplished this. No one has ever won the Modern Grand Slam. In 1930, Bobby Jones won the U.S and British Amateurs and Opens, a feat which was termed the Grand Slam and has never been duplicated. The 28-year old Jones retired from competitive golf that year. In addition, The PGA of America's Grand Slam of Golf is a late-season event that features the winners of that year's four Professional Major championships.

Golf Range A facility where people can practice their full swings and, in some cases, their short games. (In Japan , golf ranges are very popular because the number of golf courses is limited).

Grain The direction which the blades of grass grow, which is of primary importance on the greens (particularly Bermuda grass greens) as this can affect how much and in which direction a putt breaks. (Sam Snead won many tournaments in Florida because he was so adept at reading the grain in the greens).

Greenkeeper An older, outdated term for the course superintendent. (He was the greenkeeper at Merion for many years).

Grip (Equipment) That part of the golf club where the hands are placed. (After a disappointing round, John's PGA Professional suggested that he have his grips replaced).

Grip The placing and positioning of the hands on the club. The various types include the Vardon or overlapping, the interlocking and the 10-finger or baseball grip. (The Vardon grip is the most popular grip today). There is also the reverse-overlapping grip, in which the index finger of the left or top hand overlaps the smallest finger of the right or bottom hand. This is primarily used in putting, although some players use this grip when chipping the ball.

Groove (equipment) The horizontal scoring lines on the face of the club that help impart spin on the ball. (Before teeing off on the par-3 12th, Jack Nicklaus cleaned out the grooves of his 8-iron with a tee.)

Groove A description of a swing that consistently follows the same path, time after time. (In his post-round interview, Curtis Strange said his swing was in the groove all day, resulting in a 65.)

Ground When referred to in the Rules of Golf, it means the point when the club touches the ground (or water) prior to playing the shot. (It is against the Rules of Golf to ground your club in a hazard).