- Baseball. either of the two lines connecting home plate with first and third base respectively, or their continuations to the end of the outfield.
- Also called free throw line. Basketball. a line 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.
Origin of foul line
An Americanism dating back to 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for foul line
The latter are of the same substance as the foul-line and all are sunk flush with the surface of the bed.The Wonder Book of Knowledge