Dead ball  -- the ball at the end of a “Rally”; no longer playable until it is served again

Defensive Shot – a strategic shot intended to force an opponent out of his or her position at “Center Court” and into a more far-flung place such as a “Back Court” corner and perhaps set up a scoring opportunity on a later shot

Donut – a shutout game in which one player loses without scoring for a final score of 15-0 (the zero sort of resembles a donut)

Doubles – a game for four players divided into two teams of two

Down the Line – a shot near a side wall that hits the wall and bounces straight back along the same wall

Draw – the positioning of players in a tournament bracket, also known as “Seeding”

Drive – an aggressively hit, fast moving ball

Drive Serve – a hard and low serve, usually an attempt to get an “Ace”

Drive service zone – line in the service area one on each end three feet from the side wall on each side designating areas restricted from entering when hitting a “Drive Serve”

Eyeguards – safety equipment required as protection for the eyes in all professional racquetball play

Fault – an illegal maneuver or violation committed when serving; two consecutive faults result in a loss of serve

Short Serve – the ball lands on or in front of the “Short Line”

Long Serve – ball strikes the “Back Wall” before hitting the ground

Three Wall Serve – the ball strikes the “Front Wall” and both side walls before hitting the Floor

Foot Fault – the server steps over the line during the serve

Out of Court Serve – ball bounces off the front wall and leaves the court area before bouncing off the floor

Screen Serve – a served ball that rebounds so close to the server that is or her opponent is prevented from a fair chance at returning the serve

Five-foot line – a line, often red, running parallel to the short line, five feet closer to the back wall, landing a serve behind this line is a “Fault”

Foot fault – a violation that occurs during the serve, when one of the server’s feet (or the foot of his or her partner in “Doubles) steps outside of the “Service Area” before the served ball bounces

Forehand – an essential stroke that moves from the racquet hand side across the body, the most common shot

Forfeit – conceding a game to an opponent, whether  voluntarily or involuntarily due to absence  

Front Court – the area of the court between the “Front Wall” and the “Short Line”