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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use fair ball in a sentence
A 'fair ball' is still given, but the custom of a stag-hunt on the second day has been dropped.Devon, Its Moorlands, Streams and Coasts | Rosalind Northcote
As soon as the striker has struck a fair ball, he shall be considered “a player running the bases.”
Smithers took it for an inshoot, and, in his judgment, it must be a fair ball.Frank Merriwell's Cruise | Burt L. Standish
Johnny could pitch a very fair ball for an amateur, and the rock went true without any frills or curving deception.Skyrider | B. M. Bower