a batted ground ball that is hit and played outside the foul lines, or that passes outside the foul lines at first or third base, or that is played outside the foul line between home and first or third base regardless of where hit.
a batted fly ball played or landing outside the foul lines.
Slang. an incompetent, unlucky, or eccentric person.
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- foul line,
- foul marten,
- foul matter,
- foul one's nest,
- foul play
Origin of foul ball
An Americanism dating back to 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019