fair ball
- a batted ball that both lands and settles within the foul lines in the infield, or that is within the foul lines when bounding to the outfield past first or third base, or that first lands within the foul lines of the outfield or would if it were not caught or deflected.
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Origin of fair ball
First recorded in 1855–60
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018