/ Dictionary / Index F foul pole: Meaning and Definition of Find definitions for: foul' pole" Pronunciation: [key] — Baseball. Baseball. either of two poles, one on each foul line, being the vertical continuation of the outfield fence or wall, used by the umpire as a sight line in determining whether a fly ball hit near the foul line is a fair or foul ball. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. foul play fouls Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language