Address Position taken by a player prior to hitting a shot. According to the USGA Rules of Golf, a player has "addressed" the ball when he has taken his stance and grounded his club. In a hazard a player is considered to have addressed the ball when he has taken his stance.
Aerify Process of boring small holes, typically less than 3/4" in diameter, into a putting green (or the fairway) in order to improve growth. The process is usually done once or twice per year.
Albatross A double eagle; a score of 3 under par on a hole; examples are a 1 on a par 4 or a 2 on a par 5.
Amateur Any golfer who plays the game for enjoyment and who does not receive direct monetary compensation due to his or her playing or teaching skills.
Approach A shot from off the green toward the hole; also the closely-mown grassy area leading up to a green.
Apron The closely mown area encircling a putting green; also called fringe.
Arc The nearly circular curve around the body made by a golf swing.
Army Golf Slang term given to a player who has directional problems, especially from the tee. One shot will go to the right, one will go left...(left, right, left, right.) Hence the term "army golf.";
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Away The player farther from the hole whose turn it is to play.