Baseball. either of the two lines connecting home plate with first and third base respectively, or their continuations to the end of the outfield.
2. Also called throw line">free throw line. Basketball.
on the court 15 feet (4.6 meters) from the backboard, from which
foul shots are taken.
Bowling. a line on an alley at right angles to the gutters and 60 feet (18.3 meters) from the center of the spot for the headpin, across which a bowler may not step for fair delivery of the ball.