FOUL LINE

n. 1. Either of two lines separating fair from foul ground in baseball. Willie hit the ball just inside the foul line for a double. 2. A line across the upper end of a bowling alley across which a bowler must not step. John bowled a strike but it didn't count because he stepped over the foul line. 3. A line on the floor in front of the basket in basketball, from which foul shots are made. Tony scored eight points from the foul line.